Given: Parallelogram STAR, TK ⟂ SR and TL ⟂ AR
Prove: TS / TA = SK / AL
Click or touch to draw on the diagram
∠TKS = ∠TLA
Given
AA similarity
∠S = ∠A
△TKS ~ △TLA
Parallelogram STAR, TK ⟂ SR and TL ⟂ AR
The opposite sides and angles of a parallelogram are equal
TS / TA = SK / AL
Definition
All right angles are equal