We cannot solve this without knowing the coordinate of points F and I. For educational purposes, suppose point F is (4,2) and point I is (1,-4). We can find the length using the distance formula:
d = √(x₂ - x₁)² + (y₂ - y₁)² d = √(1 - 4)² + (-4 - 2)² d = 3√5 or 6.71
