Divide the perimeter by 4: that gives you the length of one side. Then square that length: that gives you the area. In this example, 14 ÷ 4 = 3.5.

Also, What is the formula for circles?

We know that the general equation for a circle is ( x – h )^2 + ( y – k )^2 = r^2, where ( h, k ) is the center and r is the radius. So add 21 to both sides to get the constant term to the righthand side of the equation.

Hereof, What is the difference between area and perimeter?

Perimeter is the distance around the outside of a shape. Area measures the space inside a shape.

Also to know What is the area perimeter? The goal of this lesson is to help you understand the difference between area and perimeter. In simplest terms: area is the amount of space inside a shape, and perimeter is the distance around the outside of the shape.

What is a formula of cylinder?

The formula for the volume of a cylinder is V=Bh or V=πr2h . The radius of the cylinder is 8 cm and the height is 15 cm. … Therefore, the volume of the cylinder is about 3016 cubic centimeters.

## How do you find the radius?

How to Find the Radius of a Circle?

1. When the diameter is known, the formula for the radius of a circle is: Radius = Diameter / 2.
2. When the circumference is known, the formula for the radius is: Radius = Circumference / 2π
3. When the area is known, the formula for the radius is: Radius = ⎷(Area of the circle / π)

## How is perimeter written?

Add up the lengths of all four sides to find the perimeter. … The formula for the perimeter of a rectangle is often written as P = 2l + 2w, where l is the length of the rectangle and w is the width of the rectangle.

## What is perimeter and area examples?

For example, your house has a fenced yard. The perimeter is the length of the fence. If the yard is 50 ft × 50 ft your fence is 200 ft long. The area is a measure of the space contained within an object.

## What is perimeter example?

The perimeter is the distance around the object. For example, your house has a fenced yard. The perimeter is the length of the fence. If the yard is 50 ft × 50 ft your fence is 200 ft long.

## What is a perimeter in math?

Perimeter is the distance around the edge of a shape. Learn how to find the perimeter by adding up the side lengths of various shapes.

## What is surface area formula?

Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape. … We can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area.

## How do I find the volume of a rectangle?

To find the volume of a rectangular prism, multiply its 3 dimensions: length x width x height. The volume is expressed in cubic units.

## What is the π?

Succinctly, pi—which is written as the Greek letter for p, or π—is the ratio of the circumference of any circle to the diameter of that circle. Regardless of the circle’s size, this ratio will always equal pi. In decimal form, the value of pi is approximately 3.14.

## What is the diameter of a radius?

Diameter of a Circle Using Radius

Radius is the length of the line segment from the center of the circle to an endpoint on the circle and diameter is twice the length of the radius of the circle. Using this definition, the formula for the diameter is: D = Radius × 2.

## Is around the perimeter?

Perimeter is the distance around the edge of a shape. Learn how to find the perimeter by adding up the side lengths of various shapes.

## How do you find the radius with the area?

To find the radius, divide the area by pi, then take the square root.

## What is perimeter explain?

The perimeter is the total measurement of all the edges of a shape e.g. a triangle has three edges, so its perimeter is the total of those three edges added together. … The perimeter of a rectangle can be calculated by adding the length and width together and doubling it.

## What is perimeter easy?

1a : the boundary of a closed plane figure. b : the length of a perimeter. 2 : a line or strip bounding or protecting an area. 3 : outer limits —often used in plural.

## What is the perimeter of shapes?

The perimeter is the total measurement of all the edges of a shape e.g. a triangle has three edges, so its perimeter is the total of those three edges added together.

## How do you convert area to perimeter?

Perimeter of a Rectangle

1. Remember the formula for perimeter and area of a rectangle. The area of a rectangle is a = length * width, while the perimeter is p = (2 * length) + (2 * width)
2. Substitute the known values into the area formula. 36 = 4 * w. …
3. Substitute values for length and width into the perimeter formula.

## What is the formula for surface area of a rectangle?

What Is the Formula for Calculating the Surface Area of a Rectangular Prism? The formula to calculate the total surface area of a rectangular prism is given as, TSA of rectangular prism = 2(lb × bh × lh), where, l is length, b is breadth and h is the height of the prism.

## What is surface area examples?

The total area of the surface of a three-dimensional object. Example: the surface area of a cube is the area of all 6 faces added together.

## How do u find the surface area of a rectangle?

To find the area of the rectangle, just multiply the two edges together. Area (bottom edge) = length times width = lw.

## What is a formula of area of rectangle?

The formula to find the area of a rectangle is A = l × w. Substitute 15 for ‘l’ and 4 for ‘w’ in this formula. Area of a rectangle = 15 × 4 = 60. Therefore, the area of rectangle = 60 square units.

## What is length and width?

Length refers to the distance between two ends of an object. Width refers to the measuring the breadth or how wide the object is. Length can be measured in geometry by considering the biggest side of the object. Width can be measured in geometry by considering the smallest side of the object.

## What is the formula to calculate volume?

Whereas the basic formula for the area of a rectangular shape is length × width, the basic formula for volume is length × width × height.