10) Kai uses an entire can of paint on a square backdrop for the school play. The label on the can states that one can covers 27m2 of wall surface. Estimate the backdrop side length, to one decimal place.
√27 = 5.2
The backdrop's side length is 5.2 m2.
11) a square has an area of 20 cm2.
a) √20 = 4.5