This worksheet is from Study Island. All answers, as well as

This worksheet is from Study Island. All answers, as well as explained solutions, are
in the last few pages. Enjoy!
Generation Date: 03/31/2014
Generated By: Paige Cardaci
1. In the figure below, AB
DE, BC
EF, and CD
FA.
Note: picture not drawn to scale
If m AGF = m BGC = m DGC = m EGF = 69°, what is m AGB?
A. 35°
B. 111°
C. 69°
D. 42°
2. In the figure below, trapezoid WXYZ is isosceles, with WZ
Note: picture not drawn to scale
If m XWZ = 124° and m WXZ = 28°, what is m XZY?
XY.
A. 35°
B. 20°
C. 28°
D. 56°
3. In the figure below, triangle JPK is an equilateral triangle, and quadrilateral KNML is
a parallelogram.
Note: picture not drawn to scale
If m MLK = 134°, what is m PKN?
A. 88°
B. 60°
C. 44°
D. 74°
4. In the figure below, trapezoid JKLM is an isosceles trapezoid, with JM
Note: picture not drawn to scale
If m KNL = 70° and m JMN = 15°, what is m HJM?
A. 90°
B. 85°
C. 70°
KL.
D. 95°
5. In the figure below, quadrilateral PQRV and quadrilateral RSTU are divided into two
congruent halves by line PT, and PQ RQ and RS TS.
Note: picture not drawn to scale
If m PQR = 38° and m RST = 68°, what is m QRS?
A. 74°
B. 106°
C. 53°
D. 127°
6. In the figure below, each side of hexagon MNPQRS is 2 cm, and each angle measures
120°.
Note: picture not drawn to scale
If triangle NQS is an equilateral triangle, with each side 3.5 cm long, what is m MNS?
A. 30°
B. 45°
C. 60°
D. 25°
7. In the figure below, m LJK = 39° and m
KLJ = 70°.
Note: picture not drawn to scale
What is m JKH?
A. 19°
B. 39°
C. 9°
D. 90°
8. In the figure below, m RSP = 60°, m SPR = 45°, and m QRS = 111°.
Note: picture not drawn to scale
What is m QRP?
A. 36°
B. 46°
C. 90°
D. 136°
9. In the figure below, quadrilateral JKLM is a trapezoid that is not isosceles.
Note: picture not drawn to scale
If m KJM = 130°, m JML = 50°, and m KLN = 152°, what is m LKJ?
A. 152°
B. 50°
C. 162°
D. 130°
10. In the figure below, DG is parallel to EF and
FDG
DFE.
Note: picture not drawn to scale
If m FDG = 67° and m EDG = 101°, what is m FED?
A. 90°
B. 101°
C. 74°
D. 79°
11. In the figure below, quadrilateral EFHJ is a parallelogram, and triangle FGH is a
scalene right triangle.
Note: picture not drawn to scale
If m JEF = 140°, what is m HFG?
A. 30°
B. 60°
C. 40°
D. 50°
12. In the figure below, MN
MQ, RN
RQ, NO
QP, and m SON = m SPQ.
Note: picture not drawn to scale
If m RMN = 34° and m MNO = 128°, what is m OPQ?
A. 124°
B. 144°
C. 108°
D. 128°
13. In the figure below, quadrilateral GHKL is a rectangle, and triangle HJK is isosceles,
with HJ KJ.
Note: picture not drawn to scale
If m HJK = 36°, what is m JKL?
A. 172°
B. 72°
C. 162°
D. 144°
14. In the figure below, triangle JKL is isosceles, with JK
equilateral.
LK, and triangle LMN is
Note: picture not drawn to scale
If m JKL = 28°, what is m KLM?
A. 54°
B. 44°
C. 39°
D. 49°
15. In the figure below, triangle ABC is a right triangle, and quadrilateral CDEF is a
square.
Note: picture not drawn to scale
If m CAB = 57°, what is m ACF?
A. 157°
B. 147°
C. 140°
D. 150°
16. In the figure below, m PSQ = 69° and m SRQ = 27°.
Note: picture not drawn to scale
What is m PST?
A. 132°
B. 48°
C. 42°
D. 96°
17. In the figure below, triangle PQR is an isosceles triangle, PR
37°.
QR, and m PQR =
Note: picture not drawn to scale
What is m QRS?
A. 106°
B. 74°
C. 143°
D. 53°
18. In the figure below, AB is parallel to DC, and BC is parallel to ED.
Note: picture not drawn to scale
If m DCB = 90°, m DCE = 34° and m BAC = 47°, what is m ECA?
A. 81°
B. 9°
C. 103°
D. 13°
19. In the figure below, m PDE = 40°, m APB = 67°, and m AED = 106°.
Note: picture not drawn to scale
What is m AEB?
A. 33°
B. 123°
C. 213°
D. 73°
20. In the figure below, quadrilateral VWXY is a rectangle and has congruent diagonals
that bisect each other.
Note: picture not drawn to scale
If m VWY = 28°, what is m VZY?
A. 46°
B. 56°
C. 124°
D. 62°
Answers
1. D
2. C
3. D
4. B
5. C
6. A
7. A
8. A
9. A
10. D
11. D
12. C
13. C
14. B
15. B
16. B
17. B
18. D
19. A
20. B
Explanations
1. It is given that m AGF = m BGC = m DGC = m EGF = 69°. Since
DGE are vertical angles, m AGB = m DGE.
AGB and
The sum of the angle measures surrounding a single point always equals 360°.
m AGF + m AGB + m BGC + m DGC + m DGE + m EGF = 360°
(m AGF + m BGC + m DGC + m EGF) + (m AGB + m DGE) = 360°
4(m AGF) + 2(m AGB) = 360°
4(69°) + 2(m AGB) = 360°
276° + 2(m AGB) = 360°
2(m AGB) = 84°
m AGB = 42°
Therefore, m AGB = 42°.
2. Since trapezoid WXYZ is isosceles and WZ XY, both sets of base angles are
congruent. Therefore, m XWZ = m WXY and m WZY = m XYZ.
The sum of the angle measures in a quadrilateral always equals 360°.
m XWZ + m WXY + m WZY + m XYZ = 360°
2(m XWZ) + 2(m WZY) = 360°
2(124°) + 2(m WZY) = 360°
248° + 2(m WZY) = 360°
2(m WZY) = 112°
m WZY = 56°
The sum of the angle measures in a triangle always equals 180°.
m XWZ + m WXZ + m XZW = 180°
124° + 28° + m XZW = 180°
m
XZW = 28°
Since XZW and XZY are adjacent angles and form WZY, the sum of m XZW
and m XZY is equal to m WZY.
m XZW + m XZY = m WZY
28° + m XZY = 56°
m
XZY = 28°
Therefore, m XZY = 28°.
3. Since triangle JPK is equilateral, each angle is equal to 60°; therefore, m JKP = 60°.
Since quadrilateral KNML is a parallelogram, opposite angles are congruent. Therefore,
m MLK = m KNM and m LKN = m NML.
The sum of the angle measures in a quadrilateral always equals 360°.
m MLK + m KNM + m LKN + m NML = 360°
2(m MLK) + 2(m LKN) = 360°
2(134°) + 2(m LKN) = 360°
268° + 2(m LKN) = 360°
2(m LKN) = 92°
m
Since
180°.
JKP,
PKN, and
LKN = 46°
LKN form a straight angle, the sum of their measures is
m JKP + m PKN + m LKN = 180°
60° + m PKN + 46° = 180°
106° + m PKN = 180°
m
PKN = 74°
Therefore, m PKN = 74°.
4. Since KNL and JNM are vertical angles, m KNL = m JNM = 70°.
The sum of the angle measures in a triangle always equals 180°.
m JNM + m JMN + m MJN = 180°
70° + 15° + m MJN = 180°
85° + m MJN = 180°
m MJN = 95°
Since MJN and HJM form a linear pair, they are supplementary angles and the sum
of their measures is 180°.
m MJN + m HJM = 180°
95° + m HJM = 180°
m
HJM = 85°
Therefore, m HJM = 85°.
5. Since PQ RQ, triangle PQR is isosceles, which means the base angles are congruent.
So, m QRP = m QPR.
The sum of the angle measures in a triangle always equals 180°.
m PQR + m QRP + m QPR = 180°
m PQR + 2(m QRP) = 180°
38° + 2(m QRP) = 180°
2(m QRP) = 142°
m QRP = 71°
Since RS TS, triangle RST is isosceles, which means the base angles are congruent.
So, m SRT = m STR.
The sum of the angle measures in a triangle always equals 180°.
m RST + m SRT + m STR = 180°
m RST + 2(m SRT) = 180°
68° + 2(m SRT) = 180°
2(m SRT) = 112°
m SRT = 56°
Since
180°.
QRP,
QRS, and
SRT form a straight angle, the sum of their measures is
m QRP + m QRS + m SRT = 180°
71° + m QRS + 56° = 180°
127° + m QRS = 180°
m
QRS = 53°
Therefore, m QRS = 53°.
6. Since triangle NQS is equilateral, each angle is equal to 60°; therefore, m SNQ =
60°. Since each angle of hexagon MNPQRS measures 120°, m MNP = 120°.
Since their side lengths are the same, triangle SMN triangle NPQ. These triangles are
also isosceles, which means their base angles have the same measure. So, m MSN =
m MNS = m PNQ = m PQN.
Since MNS, SNQ, and PNQ are adjacent angles and form MNP, the sum of
m MNS, m SNQ, and m PNQ is equal to m MNP.
m MNS + m SNQ + m PNQ = m MNP
(m MNS + m PNQ) + m SNQ = m MNP
2(m MNS) + 60° = 120°
2(m MNS) = 60°
m MNS = 30°
Therefore, m MNS = 30°.
7. To determine m JKH, first calculate m JKL.
The sum of the angle measures in a triangle always equals 180°.
m LJK + m KLJ + m JKL = 180°
39° + 70° + m JKL = 180°
m JKL = 71°
Since LKH forms a linear pair with a right angle, it is also a right angle. Also, since
JKL and JKH are adjacent and form LKH, the sum of their measures is 90°.
m JKL + m JKH = 90°
71° + m JKH = 90°
m
JKH = 19°
Therefore, m JKH = 19°.
8. To determine m QRP, first calculate m PRS.
The sum of the angle measures in a triangle always equals 180°.
m RSP + m SPR + m PRS = 180°
60° + 45° + m PRS = 180°
m
PRS = 75°
Since PRS and QRP are adjacent angles and form QRS, the sum of m PRS and
m QRP is equal to m QRS.
m PRS + m QRP = m QRS
75° + m QRP = 111°
m QRP = 36°
Therefore, m QRP = 36°.
9. Since KLN and MLK form a linear pair, they are supplementary angles and the
sum of their measures is 180°.
m KLN + m MLK = 180°
152° + m MLK = 180°
m MLK = 28°
The sum of the angle measures in a quadrilateral always equals 360°.
m KJM + m JML + m MLK + m LKJ = 360°
130° + 50° + 28° + m LKJ = 360°
208° + m LKJ = 360°
m LKJ = 152°
Therefore, m LKJ = 152°.
10. Since FDG and EDF are adjacent angles and form EDG, the sum of m FDG
and m EDF is equal to m EDG.
m FDG + m EDF = m EDG
67° + m EDF = 101°
m EDF = 34°
Since
FDG
DFE, m FDG = m DFE = 67°.
The sum of the angle measures in a triangle always equals 180°.
m EDF + m DFE + m FED = 180°
34° + 67° + m FED = 180°
101° + m FED = 180°
m FED = 79°
Therefore, m FED = 79°.
11. Since quadrilateral EFHJ is a parallelogram, opposite angles are congruent.
Therefore, m JEF = m FHJ = 140° and m EFH = m HJE.
The sum of the angle measures in a quadrilateral always equals 360°.
m JEF + m FHJ + m EFH + m HJE = 360°
2(m JEF) + 2(m EFH) = 360°
2(140°) + 2(m EFH) = 360°
280° + 2(m EFH) = 360°
2(m EFH) = 80°
m EFH = 40°
Since EF is parallel to JG and angle FGH is a right angle, angle EFG is also a right angle.
Therefore, m EFH + m HFG = 90°.
m EFH + m HFG = 90°
40° + m HFG = 90°
m
Therefore, m HFG = 50°.
12. Since QRM is a right angle,
90°.
HFG = 50°
NRM is also a right angle; therefore, m
NRM =
The sum of the angle measures in a triangle always equals 180°.
m NRM + m RMN + m MNR = 180°
90° + 34° + m MNR = 180°
124° + m MNR = 180°
m MNR = 56°
Since MNR and RNO are adjacent angles and form MNO, the sum of m
and m RNO is equal to m MNO.
m MNR + m RNO = m MNO
MNR
56° + m RNO = 128°
m RNO = 72°
Since m NRM = 90°, m NRS = 90°. Also, since
90°.
RSO is a right angle, m RSO =
The sum of the angle measures in a quadrilateral always equals 360°.
m RNO + m NRS + m RSO + m SON = 360°
72° + 90° + 90° + m SON = 360°
252° + m SON = 360°
m SON = 108°
Therefore, since m SON = m SPQ, and SPQ is the same angle as OPQ, m OPQ
= 108°.
13. Since triangle HJK is isosceles, with HJ KJ, then m JKH = m JHK.
The sum of the angle measures in a triangle always equals 180°.
m HJK + m JKH + m JHK = 180°
m HJK + 2(m JKH) = 180°
36° + 2(m JKH) = 180°
2(m JKH) = 144°
m JKH = 72°
Since quadrilateral GHKL is a rectangle, each of its angles is a right angle; therefore,
m HKL = 90°.
Since JKH and HKL are adjacent angles and form JKL, the sum of m
m HKL is equal to m JKL.
m JKL = m JKH + m HKL
JKH and
= 72° + 90°
= 162°
Therefore, m JKL = 162°.
14. Since triangle JKL is isosceles and JK
LK, m KLJ is equal to m KJL.
The sum of the angle measures in a triangle always equals 180°.
m JKL + m KJL + m KLJ = 180°
28° + 2(m KLJ) = 180°
2(m KLJ) = 152°
m KLJ = 76°
Since triangle LMN is equilateral, each angle is equal to 60°; therefore, m
MLN = 60°.
In the figure, KLJ, KLM, and MLN form a straight angle; therefore, the sum of
their measures is 180°.
m KLJ + m KLM + m MLN = 180°
76° + m KLM + 60° = 180°
136° + m KLM = 180°
m KLM = 44°
Therefore, m KLM = 44°.
15. Since triangle ABC is a right triangle, with angle ABC as a right angle, m ABC =
90°.
The sum of the angle measures in a triangle always equals 180°.
m CAB + m ABC + m BCA = 180°
57° + 90° + m BCA = 180°
m BCA = 33°
Since BCA and ACF form a linear pair, they are supplementary angles and the sum
of their measures is 180°.
m BCA + m ACF = 180°
33° + m ACF = 180°
m ACF = 147°
Therefore, m ACF = 147°.
16. Start with triangle PSQ. Since
SQP is denoted as a right angle, its measure is 90°.
The sum of the angle measures in a triangle always equals 180°.
m SQP + m PSQ + m QPS = 180°
90° + 69° + m QPS = 180°
m QPS = 21°
Next, determine m PSR.
m QPS + m SRQ + m PSR = 180°
21° + 27° + m PSR = 180°
m PSR = 132°
Since PSR and
measures is 180°.
PST form a linear pair, they are supplementary and the sum of their
m PSR + m PST = 180°
132° + m PST = 180°
m PST = 48°
Therefore, m PST = 48°.
17. Since triangle PQR is an isosceles triangle and PR
= 37°.
QR, then m PQR = m RPQ
The sum of the angle measures in a triangle always equals 180°.
m RPQ + m PQR + m QRP = 180°
37° + 37° + m QRP = 180°
m
QRP = 106°
Since QRP and QRS form a linear pair, they are supplementary angles and the sum
of their measures is 180°.
m QRP + m QRS = 180°
106° + m QRS = 180°
m QRS = 74°
Therefore, m QRS = 74°.
18. The sum of the angle measures in a triangle always equals 180°.
m CBA + m BAC + m ACB = 180°
90° + 47° + m ACB = 180°
137° + m ACB = 180°
m ACB = 43°
Since DCE, ECA, and ACB are adjacent angles and form DCB, the sum of
m DCE, m ECA, and m ACB is equal to m DCB.
m DCE + m ECA + m ACB = m DCB
34° + m ECA + 43° = 90°
77° + m ECA = 90°
m
ECA = 13°
Therefore, m ECA = 13°.
19. Since m APB = 67°, then m DPE = 67° because they are vertical angles.
The sum of the angles in a triangle always equals 180°.
m PDE + m DPE + m PED = 180°
40° + 67° + m PED = 180°
m PED = 73°
Since PED and AEB are adjacent angles and form AED, the sum of m
m AEB is equal to m AED.
m PED + m AEB = m AED
PED and
73° + m AEB = 106°
m AEB = 33°
Therefore, m AEB = 33°.
20. Since the diagonals are congruent and bisect each other, triangle VWZ is isosceles,
with m WVZ = m VWZ. Notice that VWY is the same angle as VWZ.
The sum of the angle measures in a triangle always equals 180°.
m WVZ + m VWZ + m WZV = 180°
2(m VWZ) + m WZV = 180°
2(28°) + m WZV = 180°
56° + m WZV = 180°
m
WZV = 124°
Since WZV and VZY form a linear pair, they are supplementary angles and the sum
of their measures is 180°.
m WZV + m VZY = 180°
124° + m VZY = 180°
m VZY = 56°
Therefore, m VZY = 56°.