Answer:
x = 64.5 feet
Explanation:
Equations
An isosceles triangle has two sides of the same length and one of different length.
The fence has the shape of an isosceles triangle with a base of 61 feet. The base is the side with a different length.
Call x to the length of each of the equal sides. Since the perimeter is the sum of all three sides, and the perimeter is given as 190 feet, then:
x + x + 61 = 190
Simplifying:
2x + 61 = 190
Subtracting 61:
2x = 190 - 61 = 129
Dividing by 2:
x = 129/2
x = 64.5 feet