Question

AB in tangent to circle O at B. If AB=7 and AO=8.9, what is the radius?

Answer 1

hint : tangent and radius form 90 degrees

Answer 2

hint2 : right triangle

Answer 3

Hi,

Hint 3: @ganeshie8 just sniped me. :(

Answer 4

lol @Compassionate hint 4 : hints dont seem to be working :o

Answer 5

in that right triangle simply apply pythagorean theorem :

AO^2 = AB^2 + OB^2

8.9^2 = 7^2 + r^2

see if u can solve r :)

Answer 6

I was going like 8.6^2-7^2 :/

but that equals out to 5.5

Answer 7

Hint: B is perpendicular to your radius.

Answer 8

yes, and 5.5 is right