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Answer:
ABC=70(sum of opposite angle of a quadrilateral is 180°)
ABC+CBD=180°
70+CBD=180°
CBD=180°-70°
CBD=110°
Answered by
1
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
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