Year 8 Angles Worksheet — Level 2 — Practice Set 4 — 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 4 — Answers
State the angle rule you use.
1.Two angles on a straight line are 58° and x°. Find x.
Answer: x = 122
- Angles on a straight line add to 180°
- x = 180 − 58 = 122
2.Two angles on a straight line are 144° and x°. Find x.
Answer: x = 36
- Angles on a straight line add to 180°
- x = 180 − 144 = 36
3.Two angles of a triangle are 106° and 71°. Find the third angle.
Answer: 3°
- Angles in a triangle add to 180°
- 180 − 106 − 71 = 3
4.Two angles of a triangle are 90° and 119°. Find the third angle.
Answer: -29°
- Angles in a triangle add to 180°
- 180 − 90 − 119 = -29
5.Two angles of a triangle are 47° and 20°. Find the third angle.
Answer: 113°
- Angles in a triangle add to 180°
- 180 − 47 − 20 = 113
6.Two angles of a triangle are 48° and 96°. Find the third angle.
Answer: 36°
- Angles in a triangle add to 180°
- 180 − 48 − 96 = 36
7.Two angles of a triangle are 31° and 93°. Find the third angle.
Answer: 56°
- Angles in a triangle add to 180°
- 180 − 31 − 93 = 56
8.Two angles on a straight line are 154° and x°. Find x.
Answer: x = 26
- Angles on a straight line add to 180°
- x = 180 − 154 = 26
9.Two angles of a triangle are 78° and 54°. Find the third angle.
Answer: 48°
- Angles in a triangle add to 180°
- 180 − 78 − 54 = 48
10.Two angles on a straight line are 90° and x°. Find x.
Answer: x = 90
- Angles on a straight line add to 180°
- x = 180 − 90 = 90
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