Given: AB=AC, DE ǁ BC

Prove: AD=AE

Click or touch to draw on the diagram
Given
Substitution
(AD)(AC) = (AB)( AE)
Algebra
AB=AC, DE ǁ BC
(AD)(AB) = (AB)(AE)
AD = AE
AD/AB = AE/AC
Side-Splitter theorem
Algebra