Math · Age 11 · Geometry
Angle Sums in Triangles & Quadrilaterals (Ex. 2)
Find missing angles in quadrilaterals and special triangles.
Module
Geometry
Age
Age 11
Duration
10 min
Questions
5
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Question 1
Multiple choice
A quadrilateral has angles 90°, 90°, 80°, and x. What is x?
Question 2
Multiple choice
An isosceles triangle has two equal angles of 55°. What is the third angle?
Question 3
Multiple choice
A right-angled triangle has a 35° angle. What is the third angle?
Question 4
Sequence
Quadrilateral: 75°, 110°, 95°, x. x = 360 − 75 − 110 − ____ = 80°.
Question 5
True or false
A quadrilateral can have all four angles equal to 90°.