Question

can Anyone ans This plzz fastly
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Answer 1

first we will draw a cyclic quadrilateral
by first observation angle A =60°
angle B =90°
angle C = 120°
and angle D = 90°

then angle A + angle C = 60° + 120°=180°
Angle B + angle D=90°+90°=180°

sum ofmeasure of all angles of cyclic quadrilateral must be 360°
let's do this more three times by taking various measures of angles of cyclic quadrilateral
you must see that the sum of measure of opposite angles of cyclic quadrilateral is 180 degree