Question

an angle which is 5 times its complement

Answer 1

$\bf\huge{75}$

Let the angle be x
It's complement angle = $\frac{1}{5}x = \frac{x}{5}$

According to the Question,

$=> x + \frac{x}{5} = 90 \\ => \frac{5x +x }{5} = 90 \\ => \frac{6x}{5} = 90 \\=> x = \frac{90 \times 5}{6} \\=> x = \: 15 \times 5 \\=> x = 75$

75° is the Angle which is 5 times it's complement.