Q5 of 153 Page 118

In the adjoining figure, what value of x will make AOB, a straight line?

X=28°


AOB is a straight line


Therefore, ∠AOB = 180°


⇒ (3x +20)° + (4x -36)° = 180°


⇒ 3x + 20° + 4x - 36° = 180°


⇒ 7x - 16° = 180°


⇒ 7x = 196°


⇒ x = 28°


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