Q9 of 153 Page 148

In the given figure, AOB is a straight line. If ∠AOC = 4x° and ∠BOC = 5x°, then ∠AOC = ?

As we know that sum of adjacent angle on a straight line is 180^o.

According to question,

4x + 5x = 180^o

9x =180^o

X =20^o

Two straight lines AB and CD cut each other at O. If ∠BOD = 63°, then ∠BOD = ?

In the given figure, AOB is a straight line. If ∠AOC + ∠BOD = 95°, then ∠COD = ?

In the given figure, AOB is a straight line. If ∠AOC (3x + 10)° and ∠BOC = (4x – 26)°, then ∠BOC = ?

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