Question

найдите периметр треугольника ,если одна сторона ровна 2 целым 2/5см, а две другие равны между собй и дленнее первой стороны на 1/2см?решите пожалуйсто с поиснение !и по действиям!

Answer 1

2 2\5 = 2 4\10 = 2.4
1\2 = 0.5
2.4 + 0.5 = 2.9
Периметр = 2.9 + 2.9 + 2.4 = 8.2 см
Ответ: 8.2 см

Answer 2

Perimeter of a Triangle

To find the perimeter of a triangle, we need to add up the lengths of all three sides of the triangle.

Let's denote the lengths of the sides of the triangle as follows: - Side 1: 2 2/5 cm - Side 2: Side 1 + 1/2 cm - Side 3: Side 1 + 1/2 cm

To find the perimeter, we'll add up the lengths of all three sides:

Perimeter = Side 1 + Side 2 + Side 3

Now let's substitute the given values into the equation:

Perimeter = 2 2/5 cm + (2 2/5 cm + 1/2 cm) + (2 2/5 cm + 1/2 cm)

To simplify the calculation, let's convert the mixed numbers to improper fractions:

Perimeter = 12/5 cm + (12/5 cm + 1/2 cm) + (12/5 cm + 1/2 cm)

Now, let's add up the fractions:

Perimeter = 12/5 cm + (24/10 cm + 1/2 cm) + (24/10 cm + 1/2 cm)

To add fractions, we need to have a common denominator. In this case, the common denominator is 10:

Perimeter = 12/5 cm + (48/10 cm + 5/10 cm) + (48/10 cm + 5/10 cm)

Now, let's add the fractions:

Perimeter = 12/5 cm + 53/10 cm + 53/10 cm

To add the fractions, we need to have a common denominator. In this case, the common denominator is 10:

Perimeter = 12/5 cm + (53/10 cm + 53/10 cm)

Now, let's add the fractions:

Perimeter = 12/5 cm + 106/10 cm

To simplify the fractions, let's convert the mixed number to an improper fraction:

Perimeter = 12/5 cm + 53/5 cm

Now, let's add the fractions:

Perimeter = (12 + 53)/5 cm

Perimeter = 65/5 cm

To simplify the fraction, let's divide the numerator by the denominator:

Perimeter = 13 cm

Therefore, the perimeter of the triangle is 13 cm.

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