Question

A rectangular deck measures 15 ft. by 20 ft. What is the length of a diagonal between opposite corners?

Answer 1

sqrt(15^2 + 20^2) = 25

Answer 2

use Pythagoras theorem
which states
a^2+b^2=c^2

Answer 3

wow thanks!!

Answer 4

Think Pythagorean Triples.
(15, 20, ?) is a 5 multiple of the triple (3, 4, 5).
3*5 = 15 and 4*5 = 20. So 5*5 = 25 is the missing length (hypotenuse)

Answer 5

ohhh okay thank you! Very helpful!