Question

Длина не известна,ширина 7 см,площадь 84кв.см найти периметр

Answer 1

38 периметр прямоугольника
84/7 = 12 (сторона которая не известна)
12*2+7*2 = 38

Answer 2

84/7 = 12 см

(7+12)*2 = 38 см

Answer 3

Calculating Perimeter from Given Information

To find the perimeter of the shape with an unknown length and a width of 7 cm, given that the area is 84 sq. cm, we can use the formula for the area of a rectangle: area = length × width.

Let's calculate the length using the given information.

The formula for the area of a rectangle is: area = length × width

Given: - Width = 7 cm - Area = 84 sq. cm

We can rearrange the formula to solve for the length: length = area / width

Substitute the given values: length = 84 / 7 length = 12 cm

Now that we have the length and the width, we can calculate the perimeter of the rectangle using the formula: perimeter = 2 × (length + width)

Substitute the values: perimeter = 2 × (12 + 7) perimeter = 2 × 19 perimeter = 38 cm

So, the perimeter of the shape is 38 cm.