Answer:
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
Step-by-step explanation:
