Question

How long is the diagonal of a 12 mm-by-16 mm face of a rectangular prism?

Answer 1

that is the face we are dealing with. Notice how the two sides form a right triangle with the diagonal.

Answer 2

What formula do we use when we know the lengths of two sides of a right triangle?

Answer 3

@Jose1998 try and tell me which formula you should use. I'll tell you if you are right.

Answer 4

thats the right triangle I am talking about.

Answer 5

Pythagorean theorem, got it, thanks!