8th Grade Angles Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the 8th Grade angles worksheet.
Success TutoringWorksheetsAnswer sheet8th Grade · Mathematics · Angles8th Grade Angles Worksheet — Level 3 — Answers
State the angle rule you use.
1.Two angles of a triangle are 64° and 96°. Find the third angle.
Answer: 20°
- Angles in a triangle add to 180°
- 180 − 64 − 96 = 20
2.An isosceles triangle has an apex angle of 32°. Find each base angle.
Answer: 74°
- Base angles are equal: (180 − 32) ÷ 2
- = 148 ÷ 2 = 74
3.Three angles meet at a point: 118°, 111° and x°. Find x.
Answer: x = 131
- Angles at a point add to 360°
- x = 360 − 118 − 111 = 131
4.Three angles meet at a point: 110°, 155° and x°. Find x.
Answer: x = 95
- Angles at a point add to 360°
- x = 360 − 110 − 155 = 95
5.An isosceles triangle has an apex angle of 62°. Find each base angle.
Answer: 59°
- Base angles are equal: (180 − 62) ÷ 2
- = 118 ÷ 2 = 59
6.Three angles meet at a point: 106°, 65° and x°. Find x.
Answer: x = 189
- Angles at a point add to 360°
- x = 360 − 106 − 65 = 189
7.Two angles of a triangle are 54° and 80°. Find the third angle.
Answer: 46°
- Angles in a triangle add to 180°
- 180 − 54 − 80 = 46
8.Two angles on a straight line are 129° and x°. Find x.
Answer: x = 51
- Angles on a straight line add to 180°
- x = 180 − 129 = 51
9.Two angles on a straight line are 76° and x°. Find x.
Answer: x = 104
- Angles on a straight line add to 180°
- x = 180 − 76 = 104
10.Three angles meet at a point: 74°, 127° and x°. Find x.
Answer: x = 159
- Angles at a point add to 360°
- x = 360 − 74 − 127 = 159
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