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Quadrilateral CDEF is a parallelogram. If m∠C=2y° and m∠E=(3y-40)°. Then m∠D=?​

Sagot :

Answer:

Then measure of angle D is equal to 140°

Step-by-step explanation:

(2y)° = (3y-40)°

(40)° = (3y-2y)°

40° = y

consecutive angles are supplementary.

180° - 40°= 140°