Angles and triangles
Grade 7: angles on a line, angles in a triangle, types of triangles, vertically opposite angles.
Free to play. Teams answer on one screen; your phone is the remote. No student devices.
Questions
Two angles on a straight line add up to what total?
- 100°
- 180°
- 360°
- 90°
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180°Angles on a straight line: one angle is 65°. What is the other angle?
- 105°
- 115°
- 125°
- 25°
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115°Three angles meet on a straight line. Two are 50° and 70°. What is the third? (Answer out loud)
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60°The angles in any triangle add up to what total?
- 180°
- 270°
- 360°
- 90°
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180°A triangle has angles of 40° and 85°. What is the third angle?
- 135°
- 45°
- 55°
- 65°
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55°A triangle can have two angles that are each 100°. (True or false?)
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FalseIn a right triangle, one angle is 35° besides the right angle. What is the last angle?
- 145°
- 45°
- 55°
- 65°
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55°Which triangle has three sides of equal length?
- Equilateral
- Isosceles
- Right-angled
- Scalene
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EquilateralAn isosceles triangle has a top angle of 40°. What is each base angle?
- 140°
- 40°
- 50°
- 70°
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70°A triangle with all sides of different lengths is called scalene. (True or false?)
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TrueWhat is the size of each angle in an equilateral triangle? (Answer out loud)
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60°Two straight lines cross. One angle is 70°. What is the angle opposite it?
- 110°
- 20°
- 290°
- 70°
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70°Vertically opposite angles are always supplementary, adding up to 180°. (True or false?)
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FalseTwo lines cross. One angle is 115°. What is an angle next to it?
- 115°
- 245°
- 65°
- 75°
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65°Two lines cross. Opposite angles are (2x) and 5x − 30. What is x? (Answer out loud)
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10A triangle has angles x, 2x and 3x. What is the largest angle?
- 120°
- 30°
- 60°
- 90°
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90°