Calculate the area of a rectangle two sides of which are equal to 8 centimeters

geometry/images/geom-quad.js?mode=choose (Also see this on Properties A quadrilateral has: • four sides (edges) • four vertices (corners) • interior angles that add to 360 degrees: Try drawing a quadrilateral, and measure the angles. They should add to 360° Types of Quadrilaterals There are special types of quadrilateral: Some types are also included in the definition of other types! For example a square, rhombus and rectangle are also parallelograms. Let us look at each type in turn: The Rectangle the little squares in each corner mean "right angle" A Also opposite sides are The Square the little squares in each corner mean "right angle" A Also opposite sides are parallel. A square also fits the definition of a rectangle (all angles are 90°), and a rhombus (all sides are equal length). The Rhombus A Also opposite sides are parallel and opposite angles are equal. Another interesting thing is that the diagonals (dashed lines) meet in the middle at a right angle. In other words they "bisect" (cut in half) each other at right angles. A rhombus is sometimes called a rhomb or a diamond. The Parallelogram A NOTE: Squares, Rectangles and Rhombuses are all Parallelograms! Isosceles Trapezoid A (called a trapezium in the UK) has a pair of opposite sides parallel. And a trapezium (called a trapezoid in the UK) is a quadrilateral with NO parallel sides: Trapezoid Trapezium In the US: a pair of parallel sides NO parallel sides In the UK: NO parallel sides a pair of parallel sides (the...

Jump to Jump to Jump to Jump to Jump to Jump to Jump to How to Calculate the Area of a Rectangle If you need to find the area and perimeter of a rectangle, this calculator is the handy tool you will need. By simply inputting the length and width, this calculator will almost instantly find the perimeter (P) and the area (A). If interested in calculators for a variety of other shapes, you can look at more of our handy calculators. But you can stick around here and learn more about finding the area of a rectangle. A rectangle has four 90 degree angles. If the lengths of the sides are all the same, then the rectangle is also a square. The lengths of the sides will be given as a or b or you can use l and w for “length” and “width”. The diagonal, which goes from one vertex to the opposite vertex cutting the rectangle into two squares, is called the diagonal and noted as d. Here are the basic formulas used by the calculator. Area(A) = a(b) Perimeter (distance around the outside of the rectangle) = a + a + b + b or 2 a + 2 b and is noted as (P) Diagonal is d² = a² + b² which is the Pythagorean Theorem (see our Example of calculating the area of a rectangle: Suppose the length is a = 6 inches and the width is b = 4 inches A = a* b , so A = 6(4) = 24 inches² Using the same dimensions, we can calculate the perimeter. The perimeter is 2 a + 2 b, so in this example the perimeter P = 2(6) + 2(4) = 20 inches To find the diagonal using the same dimensions: d² = 6² + 4² = 36 + 16 = 52 Take...

Quick navigation: • • • Area of a square formula The formula for the area of a square is side 2, as seen in the figure below: The solution to the equation is straightforward multiplication and this is the formula used in our area of a square online calculator. The result will be in whatever metric you did the measurement in, but squared: square mm, square cm, square dm, square meters or square inches, square feet, square yards, square miles etc. How to calculate the area of a square? The area of a square is one of the easiest to calculate in that it requires just one measurement of the square to be known - its side. You then multiply it by itself to get to the area, so the formula used in this area of a square calculator is just as simple. The simplicity of the square is why it is usually one of the first shapes that geometry students become familiar with. In real life measurements, like in construction, engineering, landscaping, etc. we rarely deal with square areas and surfaces - they are more often rectangular in shape. Still it is a good teaching device as it contains the rules for solving many other shapes. This is because a square can be interpreted as a special case of a rhombus (equal sides and opposite equal angles), a kite (two pairs of adjacent equal angles), a trapezoid (one pair of opposite sides are parallel), a parallelogram (all opposite sides are parallel), and, of course, a rectangle, in which the opposite sides are equal in length and all of its angles a...

Output : Area = 30 Perimeter = 22 Time complexity : O(1) Auxiliary Space : O(1) This article is contributed by Saloni Gupta. If you like GeeksforGeeks and would like to contribute, you can also write an article using Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

- [Voiceover] The picture has an area of 80 square centimeters. What is the width of the picture? So here's our picture, this super fun giraffe listening to music and our picture's shape is a rectangle and we're asked to find the width of that rectangle. Well, maybe we don't know a special formula or a special equation to find width, but we do know one to find area of a rectangle, so let's use that formula and see how it can help us. We know that area of a rectangle can be found by multiplying the length of the rectangle, over here, the length, times the width. So if we multiply the two side lengths of a rectangle, we get its area. And on this picture, in this rectangle, we are told that our area is 80 square centimeters, so we already know the area, and we can use that to help us. We also know the length. We're told that this distance from here to here, this length is 10 centimeters, so the length is 10. Times the width, we don't know the width. That's what we're looking for. So what we do know though, is that we need our width to be a number that when it's multiplied times 10, we get 80 for an answer. So what number times 10 equals 80 is eight. Eight time 10 equals 80. So that means the width of our picture is eight centimeters. Let's try one more. A rectangle has an area of 24 square meters. The width of the rectangle is four meters. What is the length of the rectangle? So this time we don't even have a picture to look at, but we have enough information up here to solve...

Pentagon Shape n=5 A 5 sided polygon r = inradius (apothem) R = circumradius a = side length n = number of sides x = interior angle y = exterior angle A = area P = perimeter π = pi = 3.1415926535898 √ = square root Calculator Use Polygon Calculator Use this calculator to calculate properties of a regular polygon. Enter any 1 variable plus the number of sides or the polygon name. Calculates side length, inradius (apothem), circumradius, area and perimeter. Calculate from an regular 3-gon up to a regular 1000-gon. Units: Note that units of length are shown for convenience. They do not affect the calculations. The units are in place to give an indication of the order of the calculated results such as ft, ft 2 or ft 3. Any other base unit can be substituted. Regular Polygon Formulas A regular polygon is a polygon that is both equiangular and equilateral. All sides are equal length placed around a common center so that all angles between sides are also equal. When the number of sides, n, is equal to 3 it is an The following formulas were used to develop calculations for this calculator where a = side length, r = inradius (apothem), R = circumradius, A = area, P = perimeter, x = interior angle, y = exterior angle and n = number of sides. • Side Length a • a = 2r tan( π/n) = 2R sin( π/n) • Inradius r • r = (1/2)a cot( π/n) = R cos( π/n) • Circumradius R • R = (1/2) a csc( π/n) = r sec( π/n) • Area A • A = (1/4)na 2 cot( π/n) = nr 2 tan( π/n) • Perimeter P • P = na • Interior Angl...

Area of Rectangle In geometry, a rea of rectangle is the region covered by the rectangle in a two-dimensional plane. A rectangle is a type of quadrilateral, a 2d shape that has four sides and four vertices. All the four angles of the rectangle are right angles or equal to 90 degrees. The opposite sides of the rectangle are equal and parallel to each other. To be noted, a parallelogram also has its opposite sides equal and parallel to each other but the angles are not equal to 90 degrees. Table of Contents: • • • • • • What is the Area of Rectangle? Definition: Area of rectangle is the region occupied by a rectangle within its four sides or boundaries. The area of a rectangle depends on its sides. Basically, the formula for area is equal to the product of length and breadth of the rectangle. Whereas when we speak about the , it is equal to the sum of all its four sides. Hence, we can say, the region enclosed by the perimeter of the rectangle is its area. But in the case of a square, since all the sides are equal, therefore, the area of the square will be equal to the square of side-length. Area of rectangle = Length x Breadth A = lb Area of Rectangle Formula The formula to find the area of rectangle depends on its length and width. The area of a rectangle is calculated in units by multiplying the width (or breadth) by the Length of a rectangle. Lateral and total surface areas can be calculated only for three-dimensional figures. We cannot calculate for the rectangle since ...