Hi I am desperate and in need of help really bad can someone help please?...... My question is: Line AB is tangent to circle O at B. The diagram isn't drawn to scale. If AB = 9 and AO = 21.6, what is the length of the radius? Round to the nearest tenth..... I will give medal if you could help me and also answer some more questions.... Thank You.

Question

anonymous · Answer

It's 10th grade Analytic geometry...

amistre64 · Answer

sounds like a pythag question to me

anonymous · Answer

what does that mean

amistre64 · Answer

|dw:1400175550740:dw|

amistre64 · Answer

theres not a ton of math words that start out p-y-t-h-a-g   :/

anonymous · Answer

yea it kind of looks like that

amistre64 · Answer

they give you a right triangle, a leg, and the hypotenuse ... the radius is the missing leg, solve the triangle with the pythag thrm

anonymous · Answer

@amistre64 are you still there.......

amistre64 · Answer

sites not working right for me .... was stuck in a spin of death :/

amistre64 · Answer

your link says must log in to view content .... but the picture i drew is general enough

amistre64 · Answer

the concepts involved are:

a tangent line is perpendicular to the radius of a circle (90 degrees)

BO is the radius, AO is the hypot; AB is given as a leg

the pythag thrm (a^2 + b^2 = c^2) will solve the missing part

anonymous · Answer

|dw:1400176305042:dw| that's what it looks like...