Year 9 Angles Worksheet — Level 2 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 9 angles worksheet.
Success TutoringWorksheetsAnswer sheetYear 9 · Mathematics · AnglesYear 9 Angles Worksheet — Level 2 — Practice Set 2 — Answers
State the angle rule you use.
1.Two angles on a straight line are 68° and x°. Find x.
Answer: x = 112
- Angles on a straight line add to 180°
- x = 180 − 68 = 112
2.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
3.Two angles of a triangle are 20° and 73°. Find the third angle.
Answer: 87°
- Angles in a triangle add to 180°
- 180 − 20 − 73 = 87
4.Two angles of a triangle are 85° and 23°. Find the third angle.
Answer: 72°
- Angles in a triangle add to 180°
- 180 − 85 − 23 = 72
5.Two angles on a straight line are 92° and x°. Find x.
Answer: x = 88
- Angles on a straight line add to 180°
- x = 180 − 92 = 88
6.Two angles on a straight line are 50° and x°. Find x.
Answer: x = 130
- Angles on a straight line add to 180°
- x = 180 − 50 = 130
7.Two angles of a triangle are 27° and 38°. Find the third angle.
Answer: 115°
- Angles in a triangle add to 180°
- 180 − 27 − 38 = 115
8.Two angles of a triangle are 72° and 25°. Find the third angle.
Answer: 83°
- Angles in a triangle add to 180°
- 180 − 72 − 25 = 83
9.Two angles on a straight line are 136° and x°. Find x.
Answer: x = 44
- Angles on a straight line add to 180°
- x = 180 − 136 = 44
10.Two angles of a triangle are 114° and 24°. Find the third angle.
Answer: 42°
- Angles in a triangle add to 180°
- 180 − 114 − 24 = 42
Marking tips
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