Question

Which angle is complementary to angle ?

Answer 1

a)angle ACB

Basic facts:

angles in a triangle add up to 180

complementary angles are angles which add up to 90

Explanation:

we can see the triangle is a right-angle triangle

if we subtract angle ABC (90 degrees)we are left with 90 degrees

therefore angle BAC and ACB add up to 90

Answer 2

angle BAC is complementary to angle ACB

Explanation:

Complementary angles add up to 90 degrees.

In a triangle, the sum of angles is 180 degrees.

ABC is a right triangle, so angles a+c=90 degrees.