Proof Companion
Random proof
Theorems
How it works
Log in
Enter your student code
Grade
Given:
AB=AC, DE ǁ BC
Prove:
AD=AE
Click or touch to draw on the diagram
Clear drawing
Drag these
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
Statements
Reasons