Question

If two adjacent angles of a parallelogram are in the ratio 4:5, then find the measure of all angles​

Answer 1

we know that,

sum of adjacent angle of parallelogram is 180°

so,

let the angle be 4x and 5x

so,

4x+5x=180°

9x=180

x=180/9

x=20.

Hence,

4x=4×20

=80

5x=5×20

=100.

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