Question

Which are pairs of vertical angles? \

A = ∠COB & ∠COA
B = ∠BOD & ∠AOD
C = ∠COB & ∠AOD
D = ∠AOD & ∠AOC

Answer 1

Vertical angles are the angles on opposite sides of two intersecting lines:

In this case, we have the pairs:

- ∠COA and ∠BOD

- ∠COB and ∠AOD

So,

A is not correct

B is not correct

C is correct

D not correct.

So, the only correct alternative is C.