# Rhombus Calculator

> Calculate rhombus area and perimeter from diagonals or from side and height.

Page: https://askcalculators.com/calculator/rhombus-calculator/
Definition: https://askcalculators.com/calculator/rhombus-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/rhombus-calculator/schema.json
Version: 1.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/rhombus-calculator/?mode=diagonals&diagonal1=10&diagonal2=8&side=6.403124&height=5

## Inputs
- mode: Known measurements; type=select; required; default=diagonals; values=diagonals|sideHeight
- diagonal1: Diagonal d₁; type=number; required; default=10; min=0.000001
- diagonal2: Diagonal d₂; type=number; required; default=8; min=0.000001
- side: Side length; type=number; required; default=6.403124; min=0.000001
- height: Height; type=number; required; default=5; min=0.000001

## Outputs
- area: Area; format=number; primary
- perimeter: Perimeter; format=number
- sideResult: Side length used; format=number
- acuteAngle: Acute interior angle; format=number

## Formula
from diagonals A = d₁d₂ ÷ 2 and s = ½√(d₁² + d₂²); from side and height A = sh

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.