Question

rectangle qrst is shown. angle qrt is congruent to angle str, and angle str is complementary to angle qtr.
which statement is true about angles qrt and qtr?
○ they are congruent.
○ they are complementary.
○ they are supplementary.
○ they are right angles.

Explanation:

Step1: Use congruence given

$\angle QRT \cong \angle STR$

Step2: Use complementary definition

$\angle STR + \angle QTR = 90^\circ$

Step3: Substitute congruent angle

$\angle QRT + \angle QTR = 90^\circ$

Answer:

They are complementary.