Question

On a piece of paper, use a protractor to construct right triangle ABC with AB = 4 in. m ∠A = 90 °, and m ∠B=45 °

What statement is true about the triangle?
A) BC = 8 in.
B) BC = 4 in.
C) AC = 4 in.
D) AC = 2 in.

Answer 1

The answer is C

Answer 2

The answer is C. Note that angle C is 180-90-45=45 degrees, so this is a你isosceles right triangle, and it helps if we draw it on a piece of paper. Since  angle B =angle C, AB must be equal to AC=4, and BC=4*\sqrt(2), according to the Pythagorean Theorem.