 # CSG Area Calculator

This calculator requires the use of Javascript enabled and capable browsers. It is to determine the area of an object. Select the object from the options, multiple triangles, square, circle, rectangle, rhombus, regular polygon and trapezium; then answer the questions about size, number of sides, radius, base, height, length or width for the object you wish to calculate. In regular or right triangles, the height is measured in a perpendicular from the highest point to the base. In irregular triangles, enter the length of each of the sides. Triangles do NOT need to be right triangles (though they can be); just select the correct calculator. All entries should be numeric. The answer is returned as a number, based on your entries. In the listed formulae for this set of calculations, PI here is used as 3.1415926535897932. Enjoy!.

A few other area calculators for your use are our Ellipse Area Calculator, Parabola Area Calculator, Parallelogram Area Calculator, Pyramid Area Calculator, Trapezoid Area Calculator, our Surface Area Calculator, Irregular Polygon Area Calculator and our Land Parcel Area Calculator. At least you are in the right area...

## Regular Triangle

Formula - A = B x 1/2 x H
Enter the width of the base
Enter the height of the triangle
square units

## Right Triangle (Regular, Isosceles or 30-60-90)

Formula - A = B x 1/2 x H
Enter the width of the base
Enter the height of the triangle
square units

## Irregular Triangle

Formula - s = (a + b + c) / 2 or 1/2 of the perimeter of the triangle
Formula - A = SquareRoot(s * (s - a) * (s - b) * (s - c))
Enter the length of side one
Enter the length of side two
Enter the length of side three
square units

## Square

Formula - A = L x L
Enter the length of one edge
square units

## Circle

Formula - A = PI x (r x r)
Enter the radius of the circle
square units

## Rectangle

Formula - A = L x W
Enter the length
Enter the width
square units

## Rhombus

Formula - A = (D1 x D2) / 2
Enter the greater diameter
Enter the smaller diameter
square units

## Regular Polygon

Formula - A = 1/2 * a * l * n
Enter the apothem (radius of inscribed circle)
Enter the number of sides
Enter the length of each side
square units

## Trapezium

Formula - A = (.5 * h) * (p1 + p2)
Enter the first parallel side
Enter the other parallel side
Enter the height
square units
Version 2.9.6

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