Proving Perpendicular Lines

Question

Given:Angle 1 and angle 4 are congruent Prove:Angle 2 and angle 3 are congruent

The angles are perpendicular.

Angle 1 is on the top left,angle 4 is below angle 1,angle 2 is right next to angle 1 and angle 3 is across from angle 1.Its shaped like a cross

Answer 1

First, angles are not perpendicular. Perpendicular lines create right angles.

Use the idea that colinear angles are supplementary. You have four sets of colinear angles. We also know that opposite angles are congruent.

Good luck!