## College Algebra 7th Edition

(a) $A=x^{2}$ (b) $A=lw$ (c) $A=\pi r^{2}$
(a) A square of side $x$: $A=x^{2}$ (b) A rectangle of length $l$ and width $w$: $A=lw$ (c) A circle of radius $r$: $A=\pi r^{2}$