Question

I need help!!!!!!! i do not know what the answer and if I'm sure

Answer 1

The relationship among m∠BCD, m∠A and m∠B is:

• 40° + 75° = m∠BCD

Explanation:

Exterior Angle Theorem

The exterior angle of a triangle is equal to the sum of the two non-adjacent interior angles of the triangle.

According to the exterior angle theorem, m∠BCD is equal to the sum of m∠A and m∠B:

⇒ m∠A + m∠B = m∠BCD

⇒ 40° + 75° = m∠BCD

Therefore, the relationship among m∠BCD, m∠A and m∠B is:

• 40° + 75° = m∠BCD