Question

prove that angle M is 90°.
plz do it fast.It's urgent!!​

Answer 1

Answer:

in rectangle ABCD angle A equal to Angle B equal to angle c equal to angle d equal to 360 degree.

Step-by-step explanation:

angle c equal to 90 degree and CD parallel AB Mc transvetsal so angle DCM =45 degree.

angle DCM equal to angle CMB = 45 degree (since Mc is transversal).

similarly angle AMC is 45 degree.

AMC is a straight line (linear pair angle).

angle AMD + angle DMC + angle CMB =180 degree.

angle AMD +angle CMB = 45 + 45 =90.

therefore angle DMC = 90 degree.