Answer
$ 45^{\circ}$ is an acute angle.
Complement of $ 45^{\circ}$ = $ 45^{\circ}$
Supplement of $ 45^{\circ}$ = $135^{\circ}$
Work Step by Step
$ 45^{\circ}$ is an acute angle as angles that measure between $0° $and $90° $ are called acute angles.
Complement of $ 45^{\circ}$ = $ 90^{\circ} - 45^{\circ}$ = $ 45^{\circ}$
(Because sum of the measures of complementary angles is 90 degrees)
Supplement of $ 45^{\circ}$ = $ 180^{\circ} - 45^{\circ}$ = $ 135^{\circ}$
(Because sum of the measures of supplementary angles is 180 degrees)
