Year 8 Angles Worksheet — Level 2 — Practice Set 2 — 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 2 — Answers
State the angle rule you use.
1.Two angles of a triangle are 109° and 119°. Find the third angle.
Answer: -48°
- Angles in a triangle add to 180°
- 180 − 109 − 119 = -48
2.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
3.Two angles of a triangle are 64° and 56°. Find the third angle.
Answer: 60°
- Angles in a triangle add to 180°
- 180 − 64 − 56 = 60
4.Two angles of a triangle are 61° and 54°. Find the third angle.
Answer: 65°
- Angles in a triangle add to 180°
- 180 − 61 − 54 = 65
5.Two angles on a straight line are 146° and x°. Find x.
Answer: x = 34
- Angles on a straight line add to 180°
- x = 180 − 146 = 34
6.Two angles on a straight line are 70° and x°. Find x.
Answer: x = 110
- Angles on a straight line add to 180°
- x = 180 − 70 = 110
7.Two angles of a triangle are 59° and 82°. Find the third angle.
Answer: 39°
- Angles in a triangle add to 180°
- 180 − 59 − 82 = 39
8.Two angles on a straight line are 120° and x°. Find x.
Answer: x = 60
- Angles on a straight line add to 180°
- x = 180 − 120 = 60
9.Two angles of a triangle are 57° and 90°. Find the third angle.
Answer: 33°
- Angles in a triangle add to 180°
- 180 − 57 − 90 = 33
10.Two angles on a straight line are 21° and x°. Find x.
Answer: x = 159
- Angles on a straight line add to 180°
- x = 180 − 21 = 159
Marking tips
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