Question

If AB=15 and AC= 25, find AD.

Answer 1

35 or...

Answer 2

10

Answer 3

first find BC using Pythagorus

Answer 4

then for the smaller right triangles, you know:\[AD^2+BD^2=15^2\]\[CD^2+BD^2=BC^2\]\[AD+CD=25\]you then have enough equations to be able to work out what AD is.

Answer 5

start by using the Pythagorean theorem to find BC : 15^2 + BC^2 = 25^2

now move the 15^2 over to the other side by subtraction : BC^2 = 10^2

now take the square root of each to remove the squares : BC = 10

so, now you need to find AD