In right triangle ABC, we are given that ∠ABC=90∘ and AC=34. D is a point on line segment BC such that BD=12,DC=18. What is the length of AD?

Answer 1

from the information,
BC = 30
so AB^2 + 30^2 = 34^2
AB = 16

Then in triangle ABC
AD^2 = 16^2 + 12^2 = 400
AD = √400 = 20

Answer 2

math sucks