Year 9 Angles Worksheet — Level 2 — Answers
Answer sheet with worked solutions for the Year 9 angles worksheet.
Success TutoringWorksheetsAnswer sheetYear 9 · Mathematics · AnglesYear 9 Angles Worksheet — Level 2 — Answers
State the angle rule you use.
1.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
2.Two angles on a straight line are 155° and x°. Find x.
Answer: x = 25
- Angles on a straight line add to 180°
- x = 180 − 155 = 25
3.Two angles on a straight line are 85° and x°. Find x.
Answer: x = 95
- Angles on a straight line add to 180°
- x = 180 − 85 = 95
4.Two angles of a triangle are 84° and 76°. Find the third angle.
Answer: 20°
- Angles in a triangle add to 180°
- 180 − 84 − 76 = 20
5.Two angles of a triangle are 32° and 61°. Find the third angle.
Answer: 87°
- Angles in a triangle add to 180°
- 180 − 32 − 61 = 87
6.Two angles on a straight line are 63° and x°. Find x.
Answer: x = 117
- Angles on a straight line add to 180°
- x = 180 − 63 = 117
7.Two angles of a triangle are 106° and 30°. Find the third angle.
Answer: 44°
- Angles in a triangle add to 180°
- 180 − 106 − 30 = 44
8.Two angles of a triangle are 111° and 29°. Find the third angle.
Answer: 40°
- Angles in a triangle add to 180°
- 180 − 111 − 29 = 40
9.Two angles of a triangle are 119° and 93°. Find the third angle.
Answer: -32°
- Angles in a triangle add to 180°
- 180 − 119 − 93 = -32
10.Two angles on a straight line are 123° and x°. Find x.
Answer: x = 57
- Angles on a straight line add to 180°
- x = 180 − 123 = 57
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