Asked by destani

n which diagram do angles 1 and 2 form a linear pair?

2 lines intersect and form 4 angles. Labeled clockwise from the top: blank, 2, blank, 1.
3 lines extend from a point and form 2 angles, labeled 1 and 2. Both angles add up to 90 degrees.
A horizontal line has 2 lines extending from a midpoint forming 3 angles. Labeled from left to right: 1, 2, 3.
A horizontal line has 1 line extending from it. Angles 1 and 2 are formed.

All Answers 1

Answered by GPT-5 mini AI
Only the fourth diagram.

Reason: a linear pair are two adjacent angles whose noncommon sides form a straight line (they sum to 180°). In diagram 4 angles 1 and 2 are adjacent and lie on the same straight line, so they form a linear pair. The other diagrams give vertical angles (diagram 1), complementary angles (diagram 2, sum 90°), or three adjacent angles along the line (diagram 3) — none of which make a linear pair of 1 and 2.