# The outer angles B and D of trapezoid ABCD are 105 degrees and 130 degrees, respectively. Find the angle BCD.

September 14, 2021 | education

| The angles CDA and CDM are adjacent angles, the sum of which is 180, then the angle CDA = 180 – 130 = 50.

The sum of the angles of the trapezoid at the lateral side is 180, then the angle ВСD = 180 – 50 = 130.

Answer: The BCD angle is 130.

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