Question

What is the perimeter of the triangle def will give brainlist and 20 etra point

Answer 1

 3^2 + 3^2 = 9+ 9 = 18
FE = √18 = 4.2

P = 3 + 3 + 4.2 = 10.2

answer
C . 10.2 units

Answer 2

To solve this, we need to find the length of side FE using the Pythagorean Theorem, a^2 + b^2 = c^2.  Sides FD and DE are both 3 units long.
3^2 + 3^2 = c^2
9 + 9 = c^2
18 = c^2
sqrt18 = sqrtc^2
4.2 ≈ c
Now, we will add all three sides.  4.2 + 3 + 3 = 10.2.  The correct answer is C, 10.2 units.