Math · Age 11 · Geometry
Angle Facts: Finding Missing Angles (Ex. 3)
Apply multiple angle facts to find unknowns at points and on lines.
Module
Geometry
Age
Age 11
Duration
10 min
Questions
5
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Question 1
Multiple choice
An angle and its vertically opposite angle are both 72°. What is the adjacent angle on the straight line?
Question 2
Multiple choice
Four angles at a point: 90°, 90°, 90°, x. What is x?
Question 3
Multiple choice
Angles on a line: x, 2x, 3x. What is x?
Question 4
Sequence
Three angles at a point: 100°, 130°, x. Sum = 360°. x = 360 − 100 − ____ = 130°.
Question 5
True or false
If two angles are supplementary, they add up to 180°.