Question

Complete the proof that △TUV~△TSU.
T
U
V
S

Answer 1

∠TSV = 180°(it's the straight line)
∠TSU + ∠USV = ∠TSV = 180°
∠TSU + 90° = 180°
∠TSU = 90°
90° = 90°, so ∠TSU ≅ ∠TUV