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Q)

# Find the supplement of the angle $\large\frac{4}{5}$ of $90^{\circ}.$

$( A ) 108^{\circ} \\ ( B ) 75^{\circ} \\ ( C ) 72^{\circ} \\ ( D ) 110^{\circ}$

• Two angles are supplementary when the sum of the angles is $180^{\circ}$
One angle is $\frac{4}{5} * 90 = \frac{4}{5} * 5 * 18 = 4 * 18 = 72^{\circ}$
Hence the supplementary angle is $180 - 72 = 108^{\circ}$