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Match the lengths of the hypotenuse and one leg of a right triangle to the length of the other leg

Match the lengths of the hypotenuse and one leg of a right triangle to the length of the other leg class=


Answer :

top combination of hypotenuse & leg  -  D        5, 4,  with  3
2nd row  -  A                5,  √21  with    2
3rd row  -  C               65,  √7    with    4      
4th row      B

the formula is
           hoptenuse square  = leg square  +  other leg square