Question

AB is tangent to circle O at B. The diagram is not drawn to scale.

If AB=7 and AO=17.4, what is the length of the radius (r)? Round the answer to the nearest tenth. (1 point)

18.8
15.9
12.2
10.4

Answer 1

The pythagorean theorem will help you find the missing side

Answer 2

Also this is a right triangle because line AB is tangent to the circle

Answer 3

\[A^2+B^2=C^2\]

Answer 4

Where C represents the hypotenuse

Answer 5

Plug in what you know and solve for what you do not

Answer 6

is it 10.4?

Answer 7

@Johnbc

Answer 8

May have been a small error in your calculations but very close, I came up with 10.04

Answer 9

thats not in the answers though
the answers they gave me are
18.8
15.9
12.2
10.4

Answer 10

That is because the question you showed me is different to the question you mentioned in the mentioned question line AB = 7 and line AO = 17.4

Answer 11

Using those numbers I arrive at 15.9298462

Answer 12

oooooh sorry

Answer 13

That is fine as long as you understand how to do it so if you arrived at 10.4 you know how to do it with minor difficulty. Great job

Answer 14

thank you :) can you please help me with one more? im kinda failing this class. and this time i'll post the right one lol

Answer 15

@Johnbc

Answer 16

Perimeter of a triangle is just adding up all the sides so we must know all the sides to solve for perimeter

Answer 17

is it 64

Answer 18

oooooh 32

Answer 19

Im saying yes its 64 cause i just got the same thing you did @emilyboob

Answer 20

oh then i doubled opps

Answer 21

good job both you