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Caleb has a piece of rectangular paper that is 12 inches wide by 16 inches long. He drew a straight line along the diagonal of the paper. What is the length of the line Caleb drew?

Sagot :

Imagine the two sides to be the length and width of a triangle, and the line he drew as the hypotenuse. Thus, we can use the Pythagorean theorem:
c² = a² + b²
c² = 12² + 16²
c² = 144 + 256
c² = 400
c = 20 in.