Match the following reasons with the statements to complete the following proof.
Given: AD is a straight line and m CBD = mDBE
To Prove: m ABC + m DBE = 180°.
B
1. m CBD m DBE
2. ABC, CBD are supplementary
3. m ABC+m CBD = 180°
4. m ABC+mDBE = 180°
D
Substitution
....exterior sides in opposite rays
Given
Definition of supplementary
