rhomboid

A rhomboid is a parallelogram that is neither a rhombus nor a rectangle. The word rhomboid comes from the Greek word $\rho o\mu \beta o\epsilon \iota \delta \acute{\eta }\varsigma$, which is transliterated as ‘rhomboeidis’. In The Elements, Euclid has this definition:

“Of quadrilateral figures….a rhomboid (is) that which has its opposite sides and angles equal to each other but is neither equilateral (http://planetmath.org/Equilateral) nor right-angled (http://planetmath.org/RightAngle).”

Below is a picture of a rhomboid.

The for the area of a rhomboid is the same as that for all parallelograms: If $b$ is the length of its and $h$ is the length of its , then $A=bh$.

Title	rhomboid
Canonical name	Rhomboid
Date of creation	2013-03-22 17:12:35
Last modified on	2013-03-22 17:12:35
Owner	Wkbj79 (1863)
Last modified by	Wkbj79 (1863)
Numerical id	9
Author	Wkbj79 (1863)
Entry type	Definition
Classification	msc 51-00
Related topic	Parallelogram