5th Grade Angles Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the 5th Grade angles worksheet.
Success TutoringWorksheetsAnswer sheet5th Grade · Mathematics · Angles5th Grade Angles Worksheet — Level 2 — Practice Set 3 — Answers
State the angle rule you use.
1.Two angles of a triangle are 28° and 92°. Find the third angle.
Answer: 60°
- Angles in a triangle add to 180°
- 180 − 28 − 92 = 60
2.Two angles of a triangle are 39° and 54°. Find the third angle.
Answer: 87°
- Angles in a triangle add to 180°
- 180 − 39 − 54 = 87
3.Two angles of a triangle are 62° and 36°. Find the third angle.
Answer: 82°
- Angles in a triangle add to 180°
- 180 − 62 − 36 = 82
4.Two angles of a triangle are 100° and 111°. Find the third angle.
Answer: -31°
- Angles in a triangle add to 180°
- 180 − 100 − 111 = -31
5.Two angles on a straight line are 24° and x°. Find x.
Answer: x = 156
- Angles on a straight line add to 180°
- x = 180 − 24 = 156
6.Two angles of a triangle are 31° and 76°. Find the third angle.
Answer: 73°
- Angles in a triangle add to 180°
- 180 − 31 − 76 = 73
7.Two angles on a straight line are 42° and x°. Find x.
Answer: x = 138
- Angles on a straight line add to 180°
- x = 180 − 42 = 138
8.Two angles of a triangle are 61° and 50°. Find the third angle.
Answer: 69°
- Angles in a triangle add to 180°
- 180 − 61 − 50 = 69
9.Two angles of a triangle are 53° and 37°. Find the third angle.
Answer: 90°
- Angles in a triangle add to 180°
- 180 − 53 − 37 = 90
10.Two angles on a straight line are 36° and x°. Find x.
Answer: x = 144
- Angles on a straight line add to 180°
- x = 180 − 36 = 144
Marking tips
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