In an isosceles triangle, the side is 8 cm and the base is 12 cm. Find its perimeter.

The perimeter of a triangle is defined as the sum of the lengths of all its sides.

The hallmark of an isosceles triangle is that its sides are equal. In this case, the perimeter of the triangle is calculated using the formula:

P = 2a + c,

where a is the side;

c – base.

Substituting numerical values into the formula, we get:

P = 2 * 8 + 12 = 28 (cm).

Answer: The perimeter of an isosceles triangle is 28 cm.