Question

If ABC is a triangle and ∠BCD is an exterior angle then, the measure of ∠BCD is equal to:

1. is equal to twice of ∠A

2. the sum of all three interior angles of ΔABC

3. the sum of interior opposite angles of ∠BCD

4. the sum of ∠B and adjacent angle of ∠BCD

​

Answer 1

Step-by-step explanation:

3) the sum of interior opposite angles of angle bcd