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The Test
Here is a -question, multi-choice test for the "Circle Theorem: Opposite Angles in a Cyclic Quadrilateral Add Up to 180°" lesson. The pass mark is 90%. Don't worry! All the information you need to pass is in the lesson section under the test.show as slides
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The Lesson
How to Use the Circle Theorem where Opposite Angles in a Cyclic Quadrilateral Add Up to 180°
Question
What is the angle θ in the circle below?
Step-by-Step:
1
The opposite angles add up to 180°.
70° + θ = 180°
2
Subtract the known angle from 180°.
θ = 180° − 70° = 110°
Answer:
The angle θ is 110°.
This page was written by Stephen Clarke.
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