Find the value of the angle ABM if the angle MBK is a straight line and the angle ABM = CBK

Apparently, we are talking about an unfolded angle ABC, the degree measure of which is 180 °, and it consists of three angles: MBK – a straight line, and two equal angles ABM and CBK.
Angle ABM = (180 ° – 90 °) / 2 = 90 ° / 2 = 45 °.
Answer: ABM angle is 45 °.



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