Question

What does the measure of c equal

Answer 1

Answer:

As shown in picture:

BC = BA => triangle ABC is isosceles => angle BCA = angle BAC

DC = DA => triangle ADC is isosceles => angle DCA = angle DAC

=> C = BCA + DCA = BAC + DAC = A

Other wise, the sum of 4 internal angles of a quadrilateral is equal to 360 deg.

=> C + A = 360 - 100 - 45 = 215

=> C = A = 215/2 = 107.5 deg

Hope this helps!

:)