Which statement is true of two similar figures?

corresponding sides are always congruent.
corresponding angles are always congruent.
they are always different sizes, but the same shape.
the areas of the figures have the same ratio as the ratio of corresponding sides.

Corresponding angles are always congruent.

See the picture attached to better understand the problem

we know that
m ∠ACD=91.5°
m ∠ACD+m ∠ACB=180°-------> by supplementary angles
so
m ∠ACB=180-91.5-----> m ∠ACB=88.5°

m∠CAB+m ∠ACB=90°-----> by complementary angles
so
m ∠CAB=90-88.5-----> 1.5°
m∠ CAB is the new angle at the bottom left side of the door

the answer is
1.5°