Question

In the given figure, AOB is a straight line ∠AOC=40°,∠COD=4° and ∠BOD = 3°

then ∠COD​

Answer 1

Answer:

as angle aob is a straight line.

so angle aoc + angle cod + angle bod = 180

=> 40+ 4x+ 3x= 180

=> 40 + 7x= 180

=> 7x= 180- 40

=> x = 140/7

=> x = 20

so angle cod = 4(20)

angle cod = 80degree

Answer 2

Answer:

∠AOC+∠COD=100

∘

∠BOD+∠COD=146

∘

∴∠AOC=100

∘

−∠COD

∠COD+∠AOC+∠BOD=180

∘

{straight line}

∠BOD=180

∘

−100

∘

=80

∘

∠COD=146

∘

−80

∘

=66

∘