Question

the measure of ∠usv is ______ degrees. the solution is

Explanation:

Step1: Note the right - angle and given angle

We know that $\angle RST = 90^{\circ}$ and $\angle RSU=51^{\circ}$.

Step2: Use angle - subtraction formula

$\angle USV=\angle RST-\angle RSU$.
Since $\angle RST = 90^{\circ}$ and $\angle RSU = 51^{\circ}$, then $\angle USV=90 - 51$.
$90-51 = 39$.

Answer:

39