Calculating the area of polygons requires specific formula, while calculating perimeters simply involves the addition of all sides of a polygon. Calculating the perimeter or area of circles and other monogons involve for... More »

www.reference.com Math Geometry Shapes

You can calculate acreage by measuring a plot of land's length and width, multiplying those two figures together to find square footage, then dividing that number by 43,560. For irregular parcels, try splitting measureme... More »

SketchandCalc.com allows users to draw any shape, either freehand or by grid, on a simple grid and calculate both its area and perimeter. More generally, math sites such as SmartConversion.com and Calculator.net have fac... More »

www.reference.com Math Math Calculators

To calculate the area of a regular pentagon, the perimeter of the polygon is multiplied by the apothem and the result is divided in half. The mathematical formula for the calculation is area = (apothem x perimeter)/2. More »

The formula for finding perimeter is to add up the lengths of all sides of the object. If the object is a circle, then the radius is used to find the perimeter. The word perimeter originates from the Greek word peri whic... More »

www.reference.com Math Geometry Shapes

Some fourth-grade math learning goals include mastering the operations of addition, subtraction, multiplication and division using whole numbers and fractions; understanding the concepts of area and perimeter; solving pr... More »

www.reference.com Education K-12 K-12 Curriculum

Hexagons are polygons with six sides (or edges) and six angles (or vertices). They are classified as regular or irregular, as well as convex or concave. More »