Year 8 Angles Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 8 angles worksheet.
Success TutoringWorksheetsAnswer sheetYear 8 · Mathematics · AnglesYear 8 Angles Worksheet — Level 2 — Practice Set 3 — Answers
State the angle rule you use.
1.Two angles on a straight line are 149° and x°. Find x.
Answer: x = 31
- Angles on a straight line add to 180°
- x = 180 − 149 = 31
2.Two angles on a straight line are 28° and x°. Find x.
Answer: x = 152
- Angles on a straight line add to 180°
- x = 180 − 28 = 152
3.Two angles of a triangle are 95° and 28°. Find the third angle.
Answer: 57°
- Angles in a triangle add to 180°
- 180 − 95 − 28 = 57
4.Two angles on a straight line are 131° and x°. Find x.
Answer: x = 49
- Angles on a straight line add to 180°
- x = 180 − 131 = 49
5.Two angles of a triangle are 27° and 88°. Find the third angle.
Answer: 65°
- Angles in a triangle add to 180°
- 180 − 27 − 88 = 65
6.Two angles on a straight line are 62° and x°. Find x.
Answer: x = 118
- Angles on a straight line add to 180°
- x = 180 − 62 = 118
7.Two angles of a triangle are 74° and 103°. Find the third angle.
Answer: 3°
- Angles in a triangle add to 180°
- 180 − 74 − 103 = 3
8.Two angles of a triangle are 83° and 118°. Find the third angle.
Answer: -21°
- Angles in a triangle add to 180°
- 180 − 83 − 118 = -21
9.Two angles on a straight line are 117° and x°. Find x.
Answer: x = 63
- Angles on a straight line add to 180°
- x = 180 − 117 = 63
10.Two angles of a triangle are 27° and 45°. Find the third angle.
Answer: 108°
- Angles in a triangle add to 180°
- 180 − 27 − 45 = 108
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