Question

Given: I II m. Write a flowchart proof to show that ∠1 ≅ ∠3.

Answer 1

flowchart proof

1) Lines m and l are parallel ------> given

2) ∠1 ≅ ∠2 -----> by alternate interior angles

3) ∠3 ≅ ∠2 -----> by vertical angles

4) ∠1 ≅ ∠3 ----> by the transitive property