Question

In the right triangle shown DF=EF=3. How long is DE?

Answer 1

4.24

Explanation:

To solve this, use the Pythagorean therom. A^2 + b^2 = C^2

in this case a = 3 and b = 3

so 9 + 9 = sqrt 18

4.24

Answer 2

Answer:3√(2)

Explanation:

DF=3

EF=3

DE=√(3^2 + 3^2)

DE=√(3x3 + 3x3)

DE=√(9+9)

DE=√(18)

DE=√(2 x 9)

DE=√(2) x √(9)

DE=√(2) x 3

DE=3√(2)