Question

solve the problem urgent

Answer 1

Answer:

Q.39  Ans: 90 deg

Step-by-step explanation:

every traingle in the quadrilateral becomes isosceles triangle as two sides i.e radii of the circle are same. So, the base angles of the triangles become same.

Let the center be 'O'

Therefore, BCO became 55

Angle COB becane 70. Therefore angle COD became 110 (opposite angles)

Therefore, angle DOC became 35

35 + 55 = 90.