Question

prove that theorem that opposite angles of a cyclic quadrilateral are supplementary
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Answer 1

Answer:

sum of opposite angles of cyclic quadrilateral is 180 but angle ACB + angle b c a + angle abc is 180 sum of angle of a triangle there for angle ADC + angle abc = 219 therefore angle b a d + b c d equals to 160 - a d c plus ABC = 2 180 hands to converse of this theorem is also true