Question

A square with a side of 12 is increased to a side of 15. By how much is the diagonal increased by?

Answer 1

use the pythagorean theorem to find the diagonal when it was 12
then when it's 15

then get their difference, that's how much the diagonal increased by

Answer 2

a diagonal is always \[\sqrt{2}\times side\]

Answer 3

....using the pythagorean theorum like jdoe said

Answer 4

@jdoe0001 I solved but I don't know what exactly is. 3 , right?

Answer 5

hmmm, true.. you could just use the 3x3 square too

Answer 6

so it will be \[15\sqrt{2}-12\sqrt{2}\]
i think...
correct me if i am wrong @jdoe0001