In the following figure (not to scale), AD bisects `angleBAC`. If `angleBAD=45^(@)` is inscribed in a circle, then which of the following is the longest?

Which of the following is the longest wave?

Which of the following is the longest wave?

In the following (not a scale) , if BC=20cm and angleBAD =angle CAD , then BD = ___________.

Suppose ABCD (in order) is a quadrilateral inscribed in a circle. Which of a following is/are always true ?

In the following figure, a circle a inscribed in square ABCD and the square is circusmscribed by a circle. If the radius of the smaller circle is r cm, then find the area of the shaded region (in cm^(2) ).

In figure, AD bisects angleAandADbotBC . Is BD = CD? Why?

In the given figure, O is the centre of circle. angleAOC = 120^(@) . Find angleBAC :