Question

The dimensions of a screen are 21 ft by 20 ft. Find the length of the diagonal .

Answer 1

29 ft

Explanation:

the screens have 90 degree angles so they form right triangles with the diagonal, so use Pythagorean theorem to solve for the diagonal

diagonal² = 21² +20² , square and square root both sides of the equation

diagonal = √441+400, add

diagonal = √841, square root

diagonal = 29ft