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06-08-2018
Mathematics

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What does the question mark represent if the area of this shape is 21

What does the question mark represent if the area of this shape is 21 class=

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06-08-2018

The area 21 of a parallelogram is base times height 7. So the base must be 3.

Answer: 3

Note the 1 is irrelevant; it could be anything and the area wouldn't change.

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