Question

Одна сторона треугольника равна 12 см а вторая в 3 раза больше первой а третья на 8 см меньше найти перимитр

Answer 1

28 см P

1) 12'3=36
2) 36-8=28 

Answer 2

Problem Analysis

We are given a triangle with one side measuring 12 cm, the second side being three times the length of the first side, and the third side being 8 cm shorter than the second side. We need to find the perimeter of the triangle.

Solution

Let's break down the problem step by step:

1. Let's assume the length of the first side is a cm. 2. According to the problem, the second side is three times the length of the first side, so the length of the second side is 3a cm. 3. The third side is 8 cm shorter than the second side, so the length of the third side is 3a - 8 cm.

To find the perimeter of the triangle, we need to add the lengths of all three sides:

Perimeter = a + 3a + (3a - 8)

Simplifying the equation:

Perimeter = 7a - 8

Now, we need to substitute the value of a to find the perimeter.

Calculation

Let's substitute the value of a with 12 cm:

Perimeter = 7(12) - 8

Simplifying the equation:

Perimeter = 84 - 8

Perimeter = 76 cm

Therefore, the perimeter of the triangle is 76 cm.

Answer

The perimeter of the triangle is 76 cm.

Answer 3

Problem Analysis

We are given a triangle with one side measuring 12 cm, the second side being three times larger than the first side, and the third side being 8 cm smaller than the second side. We need to find the perimeter of the triangle.

Solution

Let's break down the problem step by step:

1. The first side of the triangle measures 12 cm. 2. The second side is three times larger than the first side. Therefore, the second side measures 12 cm * 3 = 36 cm. 3. The third side is 8 cm smaller than the second side. Therefore, the third side measures 36 cm - 8 cm = 28 cm.

Now, we can calculate the perimeter of the triangle by adding the lengths of all three sides:

Perimeter = 12 cm + 36 cm + 28 cm = 76 cm.

Therefore, the perimeter of the triangle is 76 cm.

Answer

The perimeter of the triangle is 76 cm.