Sephora draws a square with an area of 289 square centimeters. What is the length of one side of the square?
is it 18 cm?
16 cm
17 cm
15 cm
18 cm
those r the choices
ah,on my calculator 18*18 = 324
let me see, 7 times 7 ends in a nine.
A = L*W.
W = L. So replace W with L:
A = L*L = L^2
289 = L^2
Take sq. root of both sides:
L = 17 cm.