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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°.
