Question

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Answer 1

Answer:

ABC=70(sum of opposite angle of a quadrilateral is 180°)

ABC+CBD=180°

70+CBD=180°

CBD=180°-70°

CBD=110°

Answer 2

Answer:

110

angle aoc+angle abc =180 ...cyclic quadrilateral theore

110 + angle abc = 180

angle abc =180 -110

angle abc = 70

angle cba + angle cbd=180 supplementary angle

70 + angle cbd = 180

angle cbd = 180 - 70

angle cbd =70