Home
Class 10
MATHS
In Fig. 10.99, D E and D F are tan...

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

Promotional Banner

Similar Questions

Explore conceptually related problems

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

In figure, DE and DF are tangents from an external point D to a circle with centre A. If DE = 5 cm and DE_|_DF , then find the radius of the circle.

In figure, DE and DF are tangents from an external point D to a circle with centre A. If DE = 5 cm and DE_|_DF , then find the radius of the circle.

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 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

From a point Q,the length of the tangent to a circle is 24 cm and the distance of Q from the centre is 25 cm.The radius of the circle is a)7 cm b)12 cm c)15 cm d)24.5 cm

The area of a circle is increased by 22 c m^2 when its radius is increased by 1 cm. The original radius of the circle is (a)6 cm (b) 3 cm (c)4 cm (d) 3.5 cm

From a point Q, the length of the tangent to a circle is 24 cm and the distance of Q from the centre is 25 cm. The radius of the circle is (A) 7 cm (B) 12 cm (C) 15 cm (D) 24.5 cm

In the given figure, BC,BA and AC are tangents to the circle touching the circle at D,E and F respectively. If BD=30cm, CD=7cm and angleA=90^@ , find the radius of the circle.