# A parallelogram has sides with lengths of #7 # and #15 #. If the parallelogram's area is #21 #, what is the length of its longest diagonal?

Length of longest diagonal

Formula for length of the longest diagonal

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The length of the longest diagonal of the parallelogram is 17.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- A parallelogram has sides with lengths of #15 # and #12 #. If the parallelogram's area is #66 #, what is the length of its longest diagonal?
- A parallelogram has sides with lengths of #16 # and #5 #. If the parallelogram's area is #48 #, what is the length of its longest diagonal?
- Two opposite sides of a parallelogram have lengths of #7 #. If one corner of the parallelogram has an angle of #pi/4 # and the parallelogram's area is #42 #, how long are the other two sides?
- A parallelogram has sides with lengths of #21 # and #12 #. If the parallelogram's area is #84 #, what is the length of its longest diagonal?
- A rectangle has an area of 12 square centimeters and a perimeter of 16 centimeters. Which of the following could be its dimensions?

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