the measure of an angle is $64^{\\circ}$. what is the measure of its su…

$the measure of an angle is $64^{\\circ}$. what is the measure of its su…$

the measure of an angle is $64^{\circ}$. what is the measure of its supplementary angle?

Supplementary angles sum to $180^\circ$.

Subtract given angle from $180^\circ$:
$180^\circ - 64^\circ$

$116^\circ$