The side of an equilateral triangle is 5 cm long. Find the perimeter of the triangle.

The side of an equilateral triangle is 5 cm long. Find the perimeter of the triangle. Increase each side of the triangle by 2 cm. How the perimeter of the triangle will change.

To solve this problem, remember that an equilateral triangle is a triangle in which all three sides are equal. The perimeter of a triangle is equal to the sum of the lengths of all its sides. Let’s calculate what the perimeter with a side of 5 centimeters is.

P = 3 * 5 = 15 centimeters.

Extend the side of the triangle by 2 centimeters.

5 + 2 = 7 centimeters.

Let’s calculate what the perimeter of a triangle with a side of 7 centimeters is equal to.

P = 3 * 7 = 21 centimeters.

Let’s calculate by how many centimeters the perimeter of the triangle has increased.

21 – 15 = 6 cm.

Answer: 6 cm.

To solve this problem, remember that an equilateral triangle is a triangle in which all three sides are equal. The perimeter of a triangle is equal to the sum of the lengths of all its sides. Let’s calculate what the perimeter with a side of 5 centimeters is.

P = 3 * 5 = 15 centimeters.

Extend the side of the triangle by 2 centimeters.

5 + 2 = 7 centimeters.

Let’s calculate what the perimeter of a triangle with a side of 7 centimeters is equal to.

P = 3 * 7 = 21 centimeters.

Let’s calculate by how many centimeters the perimeter of the triangle has increased.

21 – 15 = 6 cm.

Answer: 6 cm.