In the figure below, `O` is the centre of the (circ)le and `A, B, C` are points on the (circ)le. What are the angles of `Delta ABC` ?

In the picture, O is the centre of the circle and A, B, C are points on it. Prove that /_OAC + /_ABC=90^@

In the figure-below, O is the centre of the circle and A B is a diameter. C is a point on the circle. i) Compute angle CAB ii) Draw another figure like this, with a different number for the size of angle C O B . Calculate angle CAB .

In the figure, O is the centre of the circle and A,B,C,D are points on it. If angleB=110^o , then What is the measure of angleAOC ? .

In the figure, O is the centre of the circle and A,B,C,D are points on it. If angleB=110^o , then What is the measure of angleD ? .

In the figure P is the centre of the circle A,B and D are points on the circle. angleP=90^o , AD=5 centimetres What is the area of triangle APD ? .

In the figure, Ois the centre of the circle and AB, CD are chords with angle O A B=angle 0 C D Rrove that A B=C D.

In the figure. below, the lines A B and CD are parallel and M is the mid point of A B . i) Compute the angles of Delta AMD, triangle MBC and Delta DCM? ii) What is special about the quadrilaterals AMCD and MBCD?

In the figure given below P, Q, R are the mid points of the sides of AB, BC and AC of the triangle ABC . The area of the triangle ABC is 60 sq.cm. find the area of the parallelogram APQR.