Answer:
10 units
Step-by-step explanation:
Using Pythagoras' identity in the right triangle
The square on the hypotenuse is equal to the sum of the squares on the other 2 sides.
let x represent the third side ( hypotenuse ) , then
x² = 7² + ([tex]\sqrt{51}[/tex] )² = 49 + 51 = 100 (take square root of both sides )
x = [tex]\sqrt{100}[/tex] = 10
The third side is 10 units
