Question

Quadrilateral points W,I,L,D is inscribed in circle O. WI is the diameter of O.

what is the angle of D?

Answer 1

As shown in picture, Quadrilateral points W,I,L,D is inscribed in circle O.

=> D + I = 180 (sum of two opposite angles)

=> D = 180 - I = 180 - 45 = 135 deg

Hope this helps!

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