In Fig. 10.79, `R Q` is a tangent to the circle with centre `O` . If `S Q=6c m` and `Q R=4c m` , then `O R=` (FIGURE) (a) 8cm (b) 3cm (c) 2.5cm (d) 5cm

In Figure, R Q is a tangent to the circle with centre O . If S Q=6c m and Q R=4c m , then O R= (a) 8cm (b) 3cm (c) 2.5cm (d) 5cm

In Fig. 10.94, if A B=8c m and P E=3c m , then A E= (FIGURE) (a) 11cm (b) 7cm (c) 5cm (d) 3cm

In Fig.10.81,AP is a tangent to the circle with centre O such that OP=4cm and /_OPA=30o. Then,AP=(FIGURE)2sqrt(2)cm (b) 2cm (c) 2sqrt(3)cm (d) 3sqrt(2)cm

In Fig. 10.87, two equal circles touch each other at T , if Q P=4. 5 c m , then Q R= (FIGURE) (a) 9cm (b) 18cm (c) 15cm (d) 13.5cm

In Fig. P Q is tangent at a point R of the circle with centre O . If /_T R Q=30^o , find /_P R S . (FIGURE)

In Fig. 10.101, P Q and P R are two tangents to a circle with centre O . If /_Q P R=46^o , then /_Q O R equals (a) 67^o (b) 134^o (c) 44^o (d) 46^o

In Fig. 10.99, D E and D F are tangents from an external point D to a circle with centre A . If D E=5c m and D E_|_D F , then the radius of the circle is (FIGURE) (a) 3cm (b) 5cm (c) 4cm (d) 6cm

A P and A Q are tangents drawn from a point A to a circle with centre O and radius 9cm. If O A=15 c m , then A P+A Q= (a) 12cm (b) 18cm (c) 24cm (d) 36cm

A P and P Q are tangents drawn from a point A to a circle with centre O and radius 9cm. If O A=15 c m , then A P+A Q= (a) 12cm (b) 18cm (c) 24cm (d) 36cm

In Figure, two equal circles touch each other at T , if Q P=4. 5 c m , then Q R= (a) 9cm (b) 18cm (c) 15cm (d) 13.5cm