In the diagram below of right triangle ACB, altitude CD is drawn to hypotenuse AB.
If AB = 45 and AC = 15, what is the length of AD?
1) 3
2) 5
3) 7
4) 9
![In the diagram below of right triangle ACB altitude CD is drawn to hypotenuse AB If AB 45 and AC 15 what is the length of AD 1 3 2 5 3 7 4 9 class=](https://us-static.z-dn.net/files/d39/35b316646efe990db94e6d8378aaecb8.png)