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Davidrmcharles · Answer 1 · 2018-06-06T01:44:57+0000

a. 27.
we can prove that the two triangles within the triangle are congruent (the triangle is an isosceles) with SAS. then we do 180- (63 x 2). then we get the top angle. and then we divide 54 by 2 to make the individual angles and then we get 27.

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