#### Answer

(a) $A=x^{2}$
(b) $A=lw$
(c) $A=\pi r^{2}$

#### Work Step by Step

(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 $r$: $A=\pi r^{2}$

Published by
Brooks Cole

ISBN 10:
1305115546

ISBN 13:
978-1-30511-554-5

(a) $A=x^{2}$
(b) $A=lw$
(c) $A=\pi r^{2}$

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