Question

Prove measure 2 & measure 5 are supplementary

Answer 1

Explanation:

∡4 = ∡2, ∡4 + ∡5 = 180°,

∡5 = 180° - ∡4

Since ∡2 = ∡4:

∡5 = 180° - ∡2
∡5 + ∡2 = 180° - ∡2 + ∡2
∡5 + ∡2 = 180°