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If the side of the square measures 14 mm, what is the length of y?

What is the area of the square?

If the side of the square measures 14 mm, what is the length of y? What is the area-example-1
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It would be 7 because a line (altitude) that forms a right angle with the triangle will split the side it’s touching in half. The area is 196 because 14x14 is196
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