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📐 Mathematics - Class 7

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Lesson 1 · Lines and Angles

Pairs of Angles

MathematicsSubject

14 minEstimated read

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Question 1 of 10

1Two angles add up to 90°. They are called

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Lesson 1 topics

Constructing Angles with a Compass Copying and Bisecting Angles Pairs of Angles

Quick Facts

Lesson: 1: Lines and Angles
Topic: Pairs of Angles
Domain: Geometry

Seven names, three facts: a straight line is 180, a full turn is 360, and parallel lines slide an angle along unchanged.

Study Tip

Before using corresponding, alternate or co-interior, look for the arrow marks. No marks means the lines are not given as parallel, and none of those three may be used.