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The answer will depend on the nature of the polygon and what is known about it.

For a triangle, for example, there are formulae if you know 3 sides; or 2 sides and an angle; or 1 side and 2 angles. In the second case you can find the area but not the perimeter.


In the case of a quadrilateral, you will require much more information, and for polygons with more sides, even more.

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Q: How do you calculate the area and perimeter of a polygon?
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Related questions

What is the perimeter for a polygon that's area is 20sq. units?

Even if you knew how many sides the polygon has, you stillcould not calculate its perimeter with that much information.Examples:-- An equilateral triangle with area of 20 has perimeter of 20.3885 .-- A square with area of 20 has perimeter of 17.889(rounded).-- A rectangle with area of 20 can have any perimeter more than 17.889 .4 by 5 . . . . area = 20, perimeter = 182 by 10 . . . area = 20, perimeter = 241 by 20 . . . area = 20, perimeter = 42..etc.


What is the difference between finding the perimeter of a polygon and finding the area of a polygon?

Finding the perimeter of a polygon is finding how far it is in total along all the edges of the polygon; whereas finding the area of a polygon is finding how much space the polygon covers. The perimeter of a polygon forms the boundary around the area of the polygon.


How do you know that area is this and perimeter is that?

You know because the area is the distance inside a polygon and a perimeter is the distance outside a polygon.


How do you find the permeter of a polygon?

The perimeter of a polygon is the sum of the length of each of its sides. If the polygon is a regular polygon the you can calculate the perimeter as [number of sides] *[the length of one side]


What measurement does a polygon have?

A polygon has lengths, angles, a perimeter and area.


What is the formula for finding the area of a regular polygon with perimeter P and apothegm length a?

Area of regular polygon: 0.5*apothem*perimeter


What is the perimeter of a polygon with the area of 7?

If you restrict yourself to integers, the perimeter of a four-sided polygon is 16.


How do you find the perimeter of a regular polygon with the apothem and area?

Perimeter = 2*Area/Apothem.


How do i calculate perimiter?

The perimeter of a shape such as a polygon is the sum of its sides.


The what of a polygon is the distance around the polygon?

the perimeter. the space inside is the area


How is the formula of a polygon closely related to the formula of the area of a circle?

The area of a polygon is greater than the area of the largest circle that can be inscribed within the polygon and smaller that the area of the smallest circle in which the polygon can be enclosed. So the areas of two circles establish a lower and upper bound to the area of the polygon. In a similar fashion, the perimeter of the polygon are also bounded by the circumferences of the two circles. This also works in reverse. That is, the area of a circle lies between the area of an inscribed polygon and that of a polygon containing the circle. And, again, the same applies to the circumference/perimeter. In fact these bounds were used to calculate the value of pi.


Does a polygon with a greater area always have a greater perimeter?

No it depends on the size of the polygon