The perimeter of an isosceles triangle is 250 mm, base a = 6.2 cm. Calculate the side.

Let’s start finding the side length of an isosceles triangle by recalling the property of the sides of an isosceles triangle.

So, in an isosceles triangle, the sides are equal to each other. From the condition, we know that the perimeter of the triangle is 250 mm (we translate mm into centimeters) = 25 cm.We also know that the base of the triangle is 6.2 cm.

Let’s compose and solve the equation:

P = 2a + b;

a is the side and b is the base of the triangle.

2 * a + 6.2 = 25;

2a = 25 – 6.2;

2a = 18.8;

a = 9.4 cm.