# A triangle has sides with lengths of 56 yards, 65 yards, and 37 yards. Is it a right triangle?

This is not a right angled triangle.

Check with Pythagoras:

So this cannot be a right angled triangle.

In fact we find:

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Yes, the triangle is a right triangle.

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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.

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