Question

A picture frame is 12 inches long and 9 inches wide. In inches, what is the diagonal length of the picture frame?

Answer 1

you have a choice. you can recognize this as a \(3:4:5\) triangle in disguise as \(9:12:15\) or you can use pythagoras

Answer 2

a^2+b^2=c^2

Answer 3

\[d^2=9^2+12^2\]
\[d^2=81+144\]
\[d^2=125\]
\[d=\sqrt{125}=15\]

Answer 4

Perfect.