What is the formula for area?
Perimeter, Area, and Volume
| Table 2. Area Formulas | ||
|---|---|---|
| Shape | Formula | Variables |
| Square | A=s2 | s is the length of the side of the square. |
| Rectangle | A=LW | L and W are the lengths of the rectangle’s sides (length and width). |
| Triangle | A=12bh | b and h are the base and height |
How do you find the area of different shapes?
How to calculate area?
- Square area formula: A = a²
- Rectangle area formula: A = a * b.
- Triangle area formulas: A = b * h / 2 or.
- Circle area formula: A = πr²
- Circle sector area formula: A = r² * angle / 2.
- Ellipse area formula: A = a * b * π
- Trapezoid area formula: A = (a + b) * h / 2.
- Parallelogram area formulas:
What is area of a shape?
Area is the term used to define the amount of space taken up by a 2D shape or surface. We measure area in square units : cm² or m². Area is calculated by multiplying the length of a shape by its width.
How do I calculate the area of an irregular shape?
To find the area of irregular shapes, the first thing to do is to divide the irregular shape into regular shapes that you can recognize such as triangles, rectangles, circles, squares and so forth… Then, find the area of these individual shapes and add them up!
What are the examples of irregular shapes?
Area Of Irregular Shapes – Definition with Examples Irregular shapes are the polygons with five or more sides of varying lengths. These shapes or figures can be decomposed further into triangles, squares, and quadrilaterals to evaluate the area.
How do I find the perimeter and area?
The perimeter of a two-dimensional shape is the distance around the shape. It is found by adding up all the sides (as long as they are all the same unit). The area of a two-dimensional shape is found by counting the number of squares that cover the shape.
How do you find the area of a 4 sided shape?
Example: A four-sided shape has two adjacent sides with lengths of 4 meters. You can find the area of this square by multiplying its base times its height: 4 × 4 = 16 square meters.
How do you find the area of 5 different sides?
How to use irregular area calculator?
- Step 1: Measure all sides of the area in one unit (Feet, Meter, Inches or any other).
- Step 2: Enter length of horizontal sides into Length 1 and Length 2. And Width of the vertical sides into Width 1 and Width 2.
- Step 3: Press calculate button.
- Our Formula: Area = b × h.
What shape has 4 sides with different lengths?
Rectangle: Like a square, a rectangle has four right angles and two pairs of opposite sides that are parallel. Unlike the square, however, although opposite sides are equal in length, sides that share a corner — adjacent sides — may have different lengths.
How do you find the area of Apothem?
You also learned the formula for finding the area of any regular polygon if you know the length of one side and the apothem: A = (n × s × a)2 A = ( n × s × a ) 2 , where n is the number of sides, s is the length of one side, and a is the apothem.
How do you find the area of a 7 sided polygon?
Determining the Area of the Heptagon The formula for this is Area=(1/2)nsr. In this case, “n” is the number of sides, “s” is the length of the sides, and “r” is the apothem. Using the same example above, with the side as 7, the area formula would be worked as follows: Area=(1/2)(7)(7)(7.268).
How do you find the area of a regular polygon triangle?
The area of any triangle is 1/2 times the length of the base (which, in the polygon, is the length of a side) multiplied by the height (which is the same as the apothem in regular polygon). See the similarities. Again, the formula for a regular polygon is 1/2 times the apothem multiplied by the perimeter.
What is the Apothem of a regular polygon?
The apothem (sometimes abbreviated as apo) of a regular polygon is a line segment from the center to the midpoint of one of its sides. Equivalently, it is the line drawn from the center of the polygon that is perpendicular to one of its sides. The word “apothem” can also refer to the length of that line segment.
How do u find the area of a decagon?
The formula to find the area of a decagon is 5a2/2 × \({\sqrt {5 + 2\sqrt{5}}}\), where ‘a’ is the side length of the decagon.
How do you find area with diameter?
The area of a circle is pi times the radius squared (A = π r²). Learn how to use this formula to find the area of a circle when given the diameter.
Can Google maps show a radius?
Note: With this tool, you can know the radius of a circle anywhere on Google Maps by simply clicking on a single point and extending or moving the circle to change the radius on the Map.
How do you find the diameter?
If you know the radius of the circle, double it to get the diameter. The radius is the distance from the center of the circle to its edge. If the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm. If you know the circumference of the circle, divide it by π to get the diameter.
What is the radius of the diameter is 4?
Use the diameter to find the radius by dividing the diameter by 2. For example, if the diameter is 4, the radius would be 2.
What is the formula of diameter and radius?
The distance between the center of the circle to its circumference is the radius. The diameter is always double the radius. Hence, the formula is derived by dividing the diameter by 2….Formulas for Radius.
| Radius Formulas | |
|---|---|
| Radius in Terms of Circumference | C ⁄ 2π |
| Radius in Terms of Area | √(A ⁄ π) |
How do you find the radius when you have the area?
How To Find The Radius Of A Circle
- The radius to circumference formula is: C = 2πr.
- The formula for radius to area is: A = πr2.
- If you need to go from radius to diameter, multiply radius times 2 : d = 2r.
What is the circumference with a radius of 4?
The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle. If a circle has a diameter of 4, its circumference is 3.14*4=12.56.
How many inches is a 4 foot circle?
Diameter of a Circle
| Diameter | ft | in |
|---|---|---|
| 4′0″ | 12.57 | 150.8 |
| 4′1″ | 12.83 | 153.9 |
| 4′2″ | 13.09 | 157.1 |
| 4′3″ | 13.35 | 160.2 |
What is the area of 16 cm?
A circle of radius = 8 or diameter = 16 or circumference = 50.27 cm has an area of: 2.011 × 10-8 square kilometers (km²) 0.02011 square meters (m²)