#### Answer

$\triangle$ ECB, $\triangle$ EDC, $\triangle$ EAB, $\triangle$ EDA

#### Work Step by Step

All lateral faces of a pyramid are triangles,
$\triangle$ ECB, $\triangle$ EDC, $\triangle$ EAB, $\triangle$ EDA are the lateral faces of pyramid.

Published by
Brooks Cole

ISBN 10:

ISBN 13:

$\triangle$ ECB, $\triangle$ EDC, $\triangle$ EAB, $\triangle$ EDA

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