What this calculator does
Calculate rhombus area and perimeter from diagonals or from side and height.
How it works
The calculator evaluates from diagonals A = d₁d₂ ÷ 2 and s = ½√(d₁² + d₂²); from side and height A = sh. Inputs are checked before calculation, and invalid values such as zero denominators or out-of-range selections produce a clear error instead of a misleading result.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
5-
?mode=Known measurementsChoice · Required · Default: diagonals · Accepted values: diagonals, sideHeight
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?diagonal1=Diagonal d₁Number · Required · Default: 10
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?diagonal2=Diagonal d₂Number · Required · Default: 8
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?side=Side lengthNumber · Required · Default: 6.403124
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?height=HeightNumber · Required · Default: 5
Outputs
4-
areaAreaNumber · Primary output
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perimeterPerimeterNumber
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sideResultSide length usedNumber
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acuteAngleAcute interior angleNumber · Suffix: °
Inputs and results
The inputs are Known measurements, Diagonal d₁, Diagonal d₂, Side length, Height. Results include Area, Perimeter, Side length used, Acute interior angle.