Rhombus - Math Is Fun

Home » What Attributes Does A Rhombus Have » Rhombus - Math Is Fun

Maybe your like

Rhombus

(Jump to Area of a Rhombus or Perimeter of a Rhombus)

A Rhombus is a flat shape with 4 equal straight sides.

rhombuses A rhombus looks like a diamond

  • All sides have equal length
  • Opposite sides are parallel, and opposite angles are equal (it is a Parallelogram)
  • The altitude is the right angle distance between opposite sides
  • And the diagonals "p" and "q" of a rhombus bisect each other at right angles

rhombus measure s and altitude

Play with a rhombus:

images/geom-quad.js?mode=rhombus

Area of a Rhombus

rhombus measure s and altitude

The Area can be calculated by:

  • the altitude times the side length: Area = altitude × s
  • the side length squared (s2) times the sine of angle A (or angle B): Area = s2 sin(A) Area = s2 sin(B)
  • by multiplying the lengths of the diagonals and then dividing by 2: Area = (p × q)/2

Example: A rhombus has diagonals of 6 m and 8 m, what is its Area?

Area = (6 m × 8 m)/2 = 24 m2

If you can draw your Rhombus, try the Area of Polygon by Drawing tool.

Perimeter of a Rhombus

The Perimeter is the distance around the edges.

rhombus perimeter

The Perimeter is 4 times "s" (the side length) because all sides are equal in length:

Perimeter = 4s

Example: A rhombus has a side length of 12 cm, what is its Perimeter?

Perimeter = 4 × 12 cm = 48 cm

Is a Square a Rhombus?

Yes, because a square is just a rhombus where the angles are all right angles.

Names

It is more common to call this shape a rhombus, but some people call it a rhomb or even a diamond.

The plural is rhombi or rhombuses. Very rarely rhombbi (with a double b) is used.

bullroarer

The name "rhombus" comes from the Greek word rhombos: a piece of wood whirled on a string to make a roaring noise! What we might call a "bullroarer".

9101, 9102, 9103, 9104, 9105, 9106, 9107, 9108, 9109, 9110 Quadrilaterals Geometry Index

Tag » What Attributes Does A Rhombus Have