Hii!
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Missing side length =
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We can use The Pythagorean Theorem to find the missing side.
It states that.

In which a and b are the legs of the triangle, and c is the longest side, called the hypotenuse.
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In this triangle we're looking for the hypotenuse.
So, we plugin the values.

Square the numbers.


Take the square root of both sides.

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Hope that this helped! Best wishes!

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