In the parallelogram ABCD, e is the midpoint of AD, connecting be and CE. If BC = 2Ab, find the degree of ∠ bec
90 degrees, angle BEC = 180 - (angle AEB + angle DEC)
Angle AEB and angle Dec complement each other
90 degrees, angle BEC = 180 - (angle AEB + angle DEC)
Angle AEB and angle Dec complement each other