#### Answer

One block added to the top of each "leg" (two columns pointing up)

#### Work Step by Step

The length of the two "legs" of the figure is always increasing by one.

Published by
Prentice Hall

ISBN 10:
0133186024

ISBN 13:
978-0-13318-602-4

One block added to the top of each "leg" (two columns pointing up)

The length of the two "legs" of the figure is always increasing by one.

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