Question

2. AB – AD and BC - DC. Solve for x:

Answer 1

From the diagram since AB = AD = BD, hence ABD is an equilateral triangle. (All angles = 60 degrees)

ADC is a straight line, hence BDC = 120 degrees and triangle BDC is an isosceles triangle.

Hence angle B = C and B+C = 180-120 = 60 degrees.

Hence, (x) angle C = A. 30 degrees

Explanation: