Question

If AC=25 mm and AB=15 mm, calculate the length of AD.

A. 16 MM
B. 15 MM
C. 9 MM
D. 14 MM

There's a picture included

Answer 1

no pic..

Answer 2

@jim_thompson5910

Answer 3

I'm doing geometry online, and I've been stuck on this question for an hour! I'm really bad with circles.

Answer 4

use theorem 3

http://www.regentsprep.org/Regents/math/geometry/GP14/CircleSegments.htm

Answer 5

I got 20....

Answer 6

And 20 isn't an option :(

Answer 7

In this case, AC*AD = AB^2

Answer 8

So it would be 25 x 15=ab^2?

Answer 9

I got 375=AB^2 now what do I do?

Answer 10

no

Answer 11

AD is the unknown thing here

Answer 12

AB = 15

Answer 13

so it would be 25 x AD= 15?

Answer 14

AB^2 on the right side, not just AB

Answer 15

Oh okay. So I got 25 X AD= 15^2
25 X AD= 225
AD= 220

Now do I square root 220?

Answer 16

25*AD = 225

AD = ???

Answer 17

14.14?

Answer 18

Or would it be just 14?

Answer 19

think of it like this

25x = 225

Answer 20

9!!!!!!! :D

Answer 21

good

Answer 22

Thank you so much!!! :D I have no Idea why I thought of square rooting.... THANK YOU!!!!!!

Answer 23

you're welcome