Question

find the angle whose complement is 2/5th of its supplement\

Answer 1

Step-by-step explanation:

$Measure \: of \: required \angle \: \\=90 \degree - \frac{2}{5} \times 180 \degree \\ = 90 \degree - 2 \times 36\degree \\ = 90 \degree -72 \degree \\ = 18 \degree$