Question

In a parallelogram one angle is 2/5 of the adjacent angles. Determine angles of parallelogram

Answer 1

Let, the angle in a parallelogram be x.

Sum of adjacent angles of a parallelogram=180°

$\frac{2}{5} x + x = 180$

$\frac{2x + 5x}{5} = 180$

$7x = 180 \times 5$

$x = 128.5$

other angle =

$\frac{2}{5} \times 128.5$

$= 51.4$

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