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 107° and 60°. Find the third angle.
Answer: 13°
- Angles in a triangle add to 180°
- 180 − 107 − 60 = 13
2.Two angles on a straight line are 109° and x°. Find x.
Answer: x = 71
- Angles on a straight line add to 180°
- x = 180 − 109 = 71
3.Two angles on a straight line are 111° and x°. Find x.
Answer: x = 69
- Angles on a straight line add to 180°
- x = 180 − 111 = 69
4.Two angles of a triangle are 51° and 69°. Find the third angle.
Answer: 60°
- Angles in a triangle add to 180°
- 180 − 51 − 69 = 60
5.Two angles of a triangle are 81° and 112°. Find the third angle.
Answer: -13°
- Angles in a triangle add to 180°
- 180 − 81 − 112 = -13
6.Two angles on a straight line are 145° and x°. Find x.
Answer: x = 35
- Angles on a straight line add to 180°
- x = 180 − 145 = 35
7.Two angles on a straight line are 94° and x°. Find x.
Answer: x = 86
- Angles on a straight line add to 180°
- x = 180 − 94 = 86
8.Two angles of a triangle are 65° and 86°. Find the third angle.
Answer: 29°
- Angles in a triangle add to 180°
- 180 − 65 − 86 = 29
9.Two angles of a triangle are 58° and 120°. Find the third angle.
Answer: 2°
- Angles in a triangle add to 180°
- 180 − 58 − 120 = 2
10.Two angles on a straight line are 93° and x°. Find x.
Answer: x = 87
- Angles on a straight line add to 180°
- x = 180 − 93 = 87
Marking tips
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