#### Answer

perimeter = 30 cm

#### Work Step by Step

RECALL:
The perimeter of a polygon is equal to the sum of the lengths of all its sides.
Add the lengths of all the sides to find the perimeter:
perimeter = $3+12+3+12= 30$ cm

Published by
Pearson

ISBN 10:
0321867327

ISBN 13:
978-0-32186-732-2

perimeter = 30 cm

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