Question

angle rst is a right angle. angle rsu has a measure of $25^{\circ}$. what is the measure of angle tsu?
$\bigcirc$ $25^{\circ}$
$\bigcirc$ $45^{\circ}$
$\bigcirc$ $65^{\circ}$
$\bigcirc$ $75^{\circ}$

Explanation:

Step1: Define total angle measure

$\angle RST = 90^\circ$

Step2: Subtract known angle

$\angle TSU = \angle RST - \angle RSU$
$\angle TSU = 90^\circ - 25^\circ$

Step3: Calculate final value

$\angle TSU = 65^\circ$

Answer:

65° (Option C. 65°)