Question

What is the length of the hypotenuse of a right triangle if each of the two legs is 4 units? square root of 8 units 4 units square root of 32 units 8 unit?

Answer 1

By the Pythagoras theorem, in a right triangle with the sides being a and b,

 a² + b² = Hypotenuse²

Hypotenuse² = 4² + 4²

Hypotenuse² = 16 + 16 = 2*16

Hypotenuse = √2 * √16

Thus, hypotenuse = 4√2

Answer 2

You would use the Pythagorean theorem to solve for the hypotenuse in a right triangle. 
a^2 + b^2 = c^2
c being the hypotenuse and a and b being the two legs
The square of 4 is 16, so
16+16=c^2
32=c^2
Now you have to find the square root of 32 to solve for the hypotenuse
The square root of 32 in radical form is equal to 4√2

Your answer is 4√2