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 on a straight line are 43° and x°. Find x.
Answer: x = 137
- Angles on a straight line add to 180°
- x = 180 − 43 = 137
2.Two angles of a triangle are 68° and 61°. Find the third angle.
Answer: 51°
- Angles in a triangle add to 180°
- 180 − 68 − 61 = 51
3.Two angles of a triangle are 21° and 59°. Find the third angle.
Answer: 100°
- Angles in a triangle add to 180°
- 180 − 21 − 59 = 100
4.Two angles of a triangle are 69° and 115°. Find the third angle.
Answer: -4°
- Angles in a triangle add to 180°
- 180 − 69 − 115 = -4
5.Two angles of a triangle are 63° and 63°. Find the third angle.
Answer: 54°
- Angles in a triangle add to 180°
- 180 − 63 − 63 = 54
6.Two angles on a straight line are 142° and x°. Find x.
Answer: x = 38
- Angles on a straight line add to 180°
- x = 180 − 142 = 38
7.Two angles of a triangle are 88° and 77°. Find the third angle.
Answer: 15°
- Angles in a triangle add to 180°
- 180 − 88 − 77 = 15
8.Two angles of a triangle are 76° and 98°. Find the third angle.
Answer: 6°
- Angles in a triangle add to 180°
- 180 − 76 − 98 = 6
9.Two angles on a straight line are 115° and x°. Find x.
Answer: x = 65
- Angles on a straight line add to 180°
- x = 180 − 115 = 65
10.Two angles of a triangle are 78° and 96°. Find the third angle.
Answer: 6°
- Angles in a triangle add to 180°
- 180 − 78 − 96 = 6
Marking tips
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