# Rhombus

## Perimeter

$$P=4\xb7a$$

## Area

$$A=a\xb7h=\frac{{d}_{1}\xb7{d}_{2}}{2}$$

## Height

$$h=a\xb7sin\alpha $$

## Diagonal 1

$${d}_{1}=2a\xb7sin\frac{\alpha}{2}$$

## Diagonal 2

$${d}_{2}=2a\xb7cos\frac{\alpha}{2}$$

Keywords: rhombus, perimeter, area, height, diagonal