Question

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

Which statement is always true about the angles in the figure?



A.
All the angles of the triangle are obtuse.

B.
The measures of the angles of the triangles are equal.

C.
m∠a + m∠b = m∠c

D.
m∠a + m∠b + m∠c = 180


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Answer 1

@AlexandervonHumboldt2

Answer 2

D by triangle sum theorem

Answer 3

thanks