The length of the hypotenuse of a right triangle is 145 units. The length of one leg of the triangle is 144 units. Mike wrote the following step to find the length of the unknown leg: Length of the unknown leg = 1452 − 1442 = 21,025 − 20,736 = 289 units Which statement best explains whether Mike's step is correct or incorrect?


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A- It is incorrect because the length of the unknown sides is the square root of 289.

B- It is incorrect because the length of the unknown side is the square root of 41,761

C-It is correct because the length of the unknown side is the difference of the lengths of the sides

D- It is correct because the length of the unknown side is the difference of the squares of the side