Question

Find the measure of angle COD

Answer 1

AOB is a straight line

∴∠AOC+∠COD+∠DOB=180

∘

⇒x+20

∘

+2x−20

∘

+60

∘

=180

∘

⇒3x=120

∘

⇒x=40

∘

∠COD=2x−20

∘

=(2×40

∘

)−20

∘

=60

∘