ERGENT pls help The figure below shows a straight line AB intersected by another straight line t:

Write a paragraph to prove that the measure of angle 1 is equal to the measure of angle 3.

When two lines intersect they form two pairs of opposite angles, 1 + 3 and 2 + 4. Another word for opposite angles are vertical angles. Vertical angles are always congruent, which means that they are equal. Adjacent angles are angles that come out of the same vertex.