Answer:
24 m
Step-by-step explanation:
The lenght of fencing needed is the sum of all sides the triangular garden represented on the coordinate grid.
The lenght of the triangular garden = 16 - 10 = 6 m
Lenght of the height = 8 - 0 = 8 m
Lenght of the hypotenuse can be calculated using coordinates of the two vertices of the ∆ that forms the hypotenuse lenght and also using the distance formula.
Coordinates of the two vertices = (10, 0) and (16, 8).

Let,





Length of fencing = 6 + 8 + 10 = 24 m
(Put what the first number is) x (the previous number) + 8 + 12 = ?
Not sure but you can figure it out.
42 - 12x = 6
Solve for 6
12x = 36
x = 3