Question 1138250


The doorway of a family room measures {{{78}}} inches by {{{36}}} inches.  What is the length of the diagonal?


The doorway of a family room is in shape of rectangle, so diagonal will divide it in two right triangles.

use Pythagorean theorem:

{{{d^2=78^2+36^2}}}

{{{d^2=6084+1296}}}

{{{d^2=7380}}}

{{{d=sqrt(7380)}}}

{{{d=85.91in}}}