Difference between revisions of "Trapezoid"
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* The perimeter is equal to the sum of the oblique sides plus the sum of the tangent sides. | * The perimeter is equal to the sum of the oblique sides plus the sum of the tangent sides. | ||
* The sum of the oblique angles will be equal to the sum of the tangent angles. | * The sum of the oblique angles will be equal to the sum of the tangent angles. | ||
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| + | In England, such a shape is called a trapezium.<ref>"Trapezium". ''Britannica Online Dictionary''.</ref> | ||
[[Category:Plane Geometry]] | [[Category:Plane Geometry]] | ||
Revision as of 10:48, March 24, 2017
A trapezoid is a four-sided polygon with two parallel sides.
The following properties arise from the definition:
- Two of the pairs of adjacent angles sum to 180o
- The area is the mean of the parallel sides multiplied by the distance between them.
- The perimeter is equal to the sum of the oblique sides plus the sum of the tangent sides.
- The sum of the oblique angles will be equal to the sum of the tangent angles.
In England, such a shape is called a trapezium.[1]
- ↑ "Trapezium". Britannica Online Dictionary.