Question

Help me please
Three copies of a triangle were rotated and positioned as shown.

Which statement about the figure is always true?
A.
Angle 2 and angle 3 form a right angle.

B.
Angle 1 and angle 3 form a straight angle.

C.
m∠1 = m∠2

D.
The sum of m∠1, m∠2, and m∠3 is 180°.

Answer 1

It has to be D because A and B are incorrect and Angle A is not equal to B.

Answer 2

The answer is D because at the end a triangle equals 180°