Question

Answer the 28th question with proper working

Answer 1

∠BAO = 108º (Given)

∠OCD = 120º (Given)

AB is // to CD (Given)

See attachment

Line XY is added in. Line XY is // to AB is // to CD

FInd ∠AOY:

Angles on opposite parallel line sum up to 180º

∠AOY = 180 - 108 = 72º

Find ∠COY:

Angles on opposite parallel line sum up to 180º

∠COY = 180 - 120 = 60º

Find ∠AOC:

∠AOC = ∠AOY + ∠COY

∠AOC = 72 + 60 = 132º

Answer: ∠AOC = 132º