Question

AB and CD are two common tangents to circles which touch each other at C. If D lies on AB such that CD = 4 cm, then AB is equal to
A. 4 cm
B. 6 cm
C. 8 cm
D. 12 cm

Answer 1

Answer:

Ans...8cm

hope it helped u...

Answer 2

Given:

AB and CD are two common tangents to circles which touch each other at C.

D lies on AB such that CD = 4 cm

To find:

AB

Solution:

We know that tangents drwn from exterior points are equal,

Hence CD =AD = 4

CD = BD =4

now,

AB = AD + BD

AB = 4 + 4 = 8

AB = 8cm