Year 7 Angles Worksheet — Level 2 — Practice Set 3 — 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 3 — Answers
State the angle rule you use.
1.Two angles on a straight line are 138° and x°. Find x.
Answer: x = 42
- Angles on a straight line add to 180°
- x = 180 − 138 = 42
2.Two angles on a straight line are 56° and x°. Find x.
Answer: x = 124
- Angles on a straight line add to 180°
- x = 180 − 56 = 124
3.Two angles on a straight line are 75° and x°. Find x.
Answer: x = 105
- Angles on a straight line add to 180°
- x = 180 − 75 = 105
4.Two angles on a straight line are 33° and x°. Find x.
Answer: x = 147
- Angles on a straight line add to 180°
- x = 180 − 33 = 147
5.Two angles of a triangle are 87° and 109°. Find the third angle.
Answer: -16°
- Angles in a triangle add to 180°
- 180 − 87 − 109 = -16
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 78° and x°. Find x.
Answer: x = 102
- Angles on a straight line add to 180°
- x = 180 − 78 = 102
8.Two angles on a straight line are 151° and x°. Find x.
Answer: x = 29
- Angles on a straight line add to 180°
- x = 180 − 151 = 29
9.Two angles on a straight line are 21° and x°. Find x.
Answer: x = 159
- Angles on a straight line add to 180°
- x = 180 − 21 = 159
10.Two angles on a straight line are 97° and x°. Find x.
Answer: x = 83
- Angles on a straight line add to 180°
- x = 180 − 97 = 83
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