To solve this task, you need to find the value of the sides of an isosceles triangle;
Consider this task and analyze it;
According to the condition of the task, we are given an isosceles triangle with a perimeter of eighteen centimeters, it is necessary to find the value of all sides of this triangle.
Let’s remember what a perimeter is;
The perimeter is the sum of the lengths of all sides.
In an isosceles triangle, the two sides are equal;
Let’s designate the sides of the triangle by the letters “x” and “y”, then;
2x + y = 18;
Find the side of the base;
y = 18 – 2x = 2 * (9 – x);
The sides are equal;
x = (18 – y) / 2.
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