Answer:
ΔEFG is an isosceles triangle.
Step-by-step explanation:
Given:
 E (0, 0), 
F (−7, 4),
G (0, 8)
ΔEFG
Solution:
Distance formula
Distance d = 
Step 1: Finding the length of  EF
By using distance formula,



Step 2: Finding the length of  FG
By using distance formula,

Step 2: Finding the length of  GE

Thus we could see that the sides EF = FG
So it is  a isosceles triangle.