7th Grade Angles Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the 7th Grade angles worksheet.
Success TutoringWorksheetsAnswer sheet7th Grade · Mathematics · Angles7th Grade Angles Worksheet — Level 2 — Practice Set 3 — Answers
State the angle rule you use.
1.Two angles on a straight line are 83° and x°. Find x.
Answer: x = 97
- Angles on a straight line add to 180°
- x = 180 − 83 = 97
2.Two angles on a straight line are 81° and x°. Find x.
Answer: x = 99
- Angles on a straight line add to 180°
- x = 180 − 81 = 99
3.Two angles on a straight line are 29° and x°. Find x.
Answer: x = 151
- Angles on a straight line add to 180°
- x = 180 − 29 = 151
4.Two angles of a triangle are 98° and 49°. Find the third angle.
Answer: 33°
- Angles in a triangle add to 180°
- 180 − 98 − 49 = 33
5.Two angles of a triangle are 107° and 71°. Find the third angle.
Answer: 2°
- Angles in a triangle add to 180°
- 180 − 107 − 71 = 2
6.Two angles on a straight line are 150° and x°. Find x.
Answer: x = 30
- Angles on a straight line add to 180°
- x = 180 − 150 = 30
7.Two angles of a triangle are 45° and 115°. Find the third angle.
Answer: 20°
- Angles in a triangle add to 180°
- 180 − 45 − 115 = 20
8.Two angles of a triangle are 31° and 35°. Find the third angle.
Answer: 114°
- Angles in a triangle add to 180°
- 180 − 31 − 35 = 114
9.Two angles on a straight line are 64° and x°. Find x.
Answer: x = 116
- Angles on a straight line add to 180°
- x = 180 − 64 = 116
10.Two angles of a triangle are 91° and 23°. Find the third angle.
Answer: 66°
- Angles in a triangle add to 180°
- 180 − 91 − 23 = 66
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