1.
In figure, chords AB and CD of the circle intersect at O. AO = 5cm, BO = 3 cm and CO=2.5cm. Determine the length of DO.
2.
In the following figure X, Y and Z are the points at which the in circle touches the sides of the triangle as shown below. If PX = 4 cm , QZ = 7 cm and YR = 9 cm , then the perimeter of triangle PQR is
3.
Subtended angle in semicircle is
4.
Let P be a point lies inside a circle then number of tangents to the circle from P is
5.
The radii of two concentric circles are 13cm and 8cm. AB is a diameter of the bigger circle. BD is a tangent to the smaller circle touching it at D. Then, the length of AD is
6.
AB & CD are chords of the circle intersect at E then length of ED, if AE = 2 cm , CE = 3cm & EB = 6cm
7.
In the shown diagram, O is the centre of the circle and angle ∠AMB =120° , the angle between the two tangents AP and BP is
8.
ABCD is a quadrilateral which circumscribe a circle, then AB - AD is
9.
Let P be the external point of the circle Let PR & PQ be the tangents to the circle such that PR = 12 cm. Then the length of PO is, (Where O centre of the circle and the radius of the circle is 5 cm.)
10.
If TP and TQ are two tangents to a circle with centre O such that ∠POQ = 110°, then angle ∠PTQ will be equal to
