Aright triangle has a hypotenuse of length 7 mm and one leg of length 3 mm. how long is the other leg? 12.6 mm 2 mm 4 mm 6.3 mm

  Option D is the correct answer.

Explanation:

 By Pythagoras theorem  we have

               Hypotenuse² = Base² + Perpendicular²

 Here hypotenuse = 7 mm

 Let us consider other leg length given as base length

 Base = 3 mm

 So we have

                     7² = 3² + Perpendicular²

            Perpendicular² = 40

            Perpendicular = 6.3 mm

 Other leg is 6.3 mm long.

  Option D is the correct answer.

6.3mm

Step-by-step explanation:

just took the test

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1