Question

In cyclic quadrilateral ABCD,AOC is a diameter of circle if angle c is equal to 15 then angle ACD is

Answer 1

Answer:

since ac is diameter therefore it divides the circle into 2 semi circle and according to the theorem angle formed in a semi circle is 90 degree.

in triangle adc angle adc +angle dac +angle acd = 180

15 + 90 + angleacd = 180

angle cd = 180 - 105

therefore angle acd = 75

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