Question

two adjacent anmgles of a parallelogram are in ratio 4:5. find the measure of all rights.

Answer 1

Sum of adjacent angles = 180°

let the angles be 4x and 5x .

ATQ

4x + 5x = 180°

9x = 180°

X = 20°.

So the angles are 4 × 20° = 80°

and 5 × 20° = 100°.

Answer 2

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↪ Let the angles be x .

↪ 4x + 5x = 180

↪ 9x = 180

↪ x = 20

↪ Angles = 4× 20 = 80 , 5×20 = 100

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