- ALinear pair
- BRight angle
- CComplementary pair
- DReflex angle
Step-by-Step Solution
A linear pair is formed by two adjacent angles whose non-common arms are opposite rays (forming a straight line); their sum is 180°.
Answer: A) Linear pair
Two adjacent angles whose non-common arms form a straight line make a:
Class 9Pairs of AnglesGeometry — Lines and Angles
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