# Find the perimeter of the rectangle if you know the area of the triangle and the side.

Find the perimeter of the rectangle if you know the area of the triangle and the side. The width is 2 dm and the area of the (right-angled) triangle S = 8 dm2

A rectangle is a rectangle with equal opposite sides and right angles.

Its area (numerical characteristic of a two-dimensional geometric figure) is calculated by the formula:

S = a * b. Provided that this value is 8 dm², and the width = 2 dm, we express the length (to find the first factor, divide the product by the second:

a = S: b = 8: 2 = 4 dm.

The perimeter is the sum of all sides. For a rectangle, it is determined by the formula:

P = 2a + 2b = 2 * 4 + 2 * 2 = 8 + 4 = 12 dm. One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.