Question

Find the length of the diagonal of the rectangle.

Answer 1

look at it as a triangle.

you need to use the pythagorean theorum: a²+b²=c² where c is the longest side or hypotenuse.

so now let's fill in what we know:

we know that the longest side is x, and that the other two sides are 7 and 12

so x²=7² + 12²

x²= 49 + 144 = 193

\[x=\sqrt{193}\] or x= 13.89