Q15 of 153 Page 148

In the adjoining figure, AOB is a straight line. If x : y : z = 4 : 5 : 6, then y = ?

Let n be the common multiple

As we know that sum of all angles on a straight line is 180^o.

4n + 5n + 6n =180^o

15n = 180^o

N = 12^o

Y = 5n = 60^o

Which of the following statements is false?

An angle is one – fifth of its supplement. The measure of the angle is

In the given figure, straight lines AB and CD intersect at O. If ∠AOC = ϕ, ∠BOC = θ and θ = 3θ, then θ = ?

In the given figure, straight lines AB and CD intersect at O. If ∠AOC + ∠BOD = 130°, then ∠AOD = ?