Sephora draws a square with an area of 289 square centimeters. What is the length of one side of the square?
5 answers
is it 18 cm?
16 cm
17 cm
15 cm
18 cm
those r the choices
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.
W = L. So replace W with L:
A = L*L = L^2
289 = L^2
Take sq. root of both sides:
L = 17 cm.
8 answers