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# Rhombus Calculator

A Rhombus is a two dimensional geometric object with four equal sides and resembles a diamond or kite shape

The opposite sides are parallel and opposite angles are equal. The two diagonals bisect each other at right angles.

It is classed as a Parallelogram.

Rhombus Shape

Sides (S) All sides are equal in a rhombus. Changing the sides affects the altitude and diagonal lengths
Altitude (a) The altitude is the perpendicular height. Changing the altitude affects the sides and diagonals
Diagonal A-A (p) Changing the diagonal length affects the sides, altitude and the angles
Diagonal B-B (q) Changing the diagonal length affects the sides,altitude and the angles
Angle A degrees Changing Angle A affects Angle B, altitude and both diagonals
Angle B degrees Changing Angle B affects Angle A, altitude and both diagonals
Area The area of the rhombus in square units
Perimeter The outer edge of the rhombus

You can refine the calculations by controlling the number of decimal places that the calculator calculates to. The default is 2 decimal places.

### This calculator includes the following algorithms:

Angle A = 180 - Angle B

Angle B = 180 - Angle A

Altitude = sin(B) x S (Sine of Angle B multiplied by Side length)

Area can be calculated several ways:

Area = a x S (Altitude x Sides)

Area = S2 x sin(A) (Side length squared multiplied by the sine of Angle A)

Area = S2 x sin(B) (Side length squared multiplied by the sine of Angle B)

Area = (p x q)/2 (diagonal A-A (p) multiplied by diagonal B-B (q) then the result is divided by two)

Perimeter = 4 x S (Side length multiplied by 4)

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