What is the area of triangle BCD?

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What is the area of triangle BCD?

by AAPL » Sun Nov 19, 2017 2:39 pm
Image

In the figure above, ABCD is a rectangle and E is the midpoint of one side. What is the area of triangle BCD?

1) BE=5 inches.
2) CD=3 inches.

The OA is C.

Please, can any expert assist me with this DS question? I don't have it clear and I appreciate if any explain it for me. Thanks.