Mathematics
Grade 7
15 min
Find missing angles in triangles and quadrilaterals
Find missing angles in triangles and quadrilaterals
Tutorial Preview
1
Find the missing angle in a triangle with angles 50° and 70°.
2
Find the missing angle in a quadrilateral with angles 80°, 100°, and 90°.
3
An isosceles triangle has a top angle of 40°. Find a base angle.
Sample Practice Questions
Easy
A triangle has angles of 60° and 60°. What is the third angle?
0.60°
1.30°
2.90°
3.120°
Easy
A right triangle has one angle of 30°. What is the third angle?
0.30°
1.60°
2.90°
3.120°
Easy
A quadrilateral has angles of 100°, 100°, and 80°. Find the last angle.
0.60°
1.70°
2.80°
3.90°
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