Question

A carpenter wants to be sure that the corner of a building is square and measures 6.0 ft and 8.0 ft along
the sides. How long should the diagonal be?
A. 12 ft
B. 10 ft
C. 11 ft
D. 14 ft

Answer 1

sqrt ( 6 ^ 2 + 8 ^ 2 ) =

sqrt ( 36 + 64 ) =

sqrt ( 100 ) = 10 ft

Answer 2

This is time for the Pythagorean Theorem.

a^2 + b^2 = c^2

6^2 + 8^2 = c^2

36 + 64 = c^2

100 = c^2

10 = c