Find the perimeter of the triangle if each side is 10 cm long.

1) A triangle is a geometric figure formed by three segments that connect three points that do not lie on one straight line. These three points are called the vertices of the triangle, and the line segments are called the sides of the triangle. The sides of a triangle form three angles at the vertices of the triangle, so a triangle can also be defined as a polygon.

The perimeter of a triangle is equal to the sum of the lengths of its sides: P = a + b + c.

2) In the condition, an equilateral triangle is given, since all its sides are equal to the same value, namely 10 cm.We use the formula above: P = 10 + 10 + 10 = 30 cm.

Answer: P = 30 cm.