Question

In the given fig AM,ANand BC fare tangents to the circle find the radius of circle if ab=8 bc=7,ca=9 units respectively.

Answer 1

Answer:

12/√5  

Step-by-step explanation:

In the given fig AM,ANand BC fare tangents to the circle find the radius of circle if ab=8 bc=7,ca=9 units respectively.

AM = AB + BM

=> AM = 8 + BM

AN = AC + CN

=> AN = 9 + CN

AM = AN (Tangents)

BM = BD  & CN = CD   ( BC Touch circle at D)

8 + BD = 9 + CD

=> BD - CD = 1

BD + CD = BC = 7

=> BD = 4  = BM

    CD = 3 = CN

Answer 2

Answer:

Step-by-step explanation:

Then after that how to find radius