Year 7 Angles Worksheet — Level 2 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 7 angles worksheet.
Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · AnglesYear 7 Angles Worksheet — Level 2 — Practice Set 2 — Answers
State the angle rule you use.
1.Two angles of a triangle are 98° and 111°. Find the third angle.
Answer: -29°
- Angles in a triangle add to 180°
- 180 − 98 − 111 = -29
2.Two angles of a triangle are 84° and 95°. Find the third angle.
Answer: 1°
- Angles in a triangle add to 180°
- 180 − 84 − 95 = 1
3.Two angles of a triangle are 76° and 113°. Find the third angle.
Answer: -9°
- Angles in a triangle add to 180°
- 180 − 76 − 113 = -9
4.Two angles on a straight line are 159° and x°. Find x.
Answer: x = 21
- Angles on a straight line add to 180°
- x = 180 − 159 = 21
5.Two angles of a triangle are 115° and 53°. Find the third angle.
Answer: 12°
- Angles in a triangle add to 180°
- 180 − 115 − 53 = 12
6.Two angles on a straight line are 59° and x°. Find x.
Answer: x = 121
- Angles on a straight line add to 180°
- x = 180 − 59 = 121
7.Two angles on a straight line are 37° and x°. Find x.
Answer: x = 143
- Angles on a straight line add to 180°
- x = 180 − 37 = 143
8.Two angles on a straight line are 112° and x°. Find x.
Answer: x = 68
- Angles on a straight line add to 180°
- x = 180 − 112 = 68
9.Two angles of a triangle are 99° and 94°. Find the third angle.
Answer: -13°
- Angles in a triangle add to 180°
- 180 − 99 − 94 = -13
10.Two angles of a triangle are 43° and 80°. Find the third angle.
Answer: 57°
- Angles in a triangle add to 180°
- 180 − 43 − 80 = 57
Marking tips
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