In Figure, `O` is the centre of the circle and `B C D` is tangent to it at `Cdot` Prove that `/_B A C+/_A C D=90^0` .

In Figure, O is the centre of a circle and P O BISECTS /_A P D . Prove that A B=C D

In Figure, O is the centre of the circle and the measure of arc A B C is 100^0dot Determine /_A D C\ a n d\ /_A B C

In Figure, A B=A C\ a n d\ D B=D Cdot\ Prove that /_A B D=/_A C D

In Figure, A B=C B\ a n d\ O is the centre of the circle. Prove that B O bisects /_A B C .

In Figure, B C is a tangent to the circle with centre OdotO E bisects A Pdot Prove that A E O ~ A B Cdot

Two circle with centres A and B intersect at C and Ddot Prove that /_A C B=/_A D Bdot

In Figure, A is the centre of the circle. A B C D is a parallelogram and C D E is a straight line. Find /_B C D\ :\ /_A B Edot

In Figure, O is the centre of the circle. If /_A P B=50^0, find /_A O B\ a n d\ /_O A B

In Figure, it is given that O is the centre of the circle and /_A O C=150^@ . Find /_A B C

In Figure A B D C\ a n d\ A D B Cdot Prove that /_D A B=\ /_D C B