 # Is A Trapezoid A Regular Polygon?

## Is every kite a rhombus?

In general, any quadrilateral with perpendicular diagonals, one of which is a line of symmetry, is a kite.

Every rhombus is a kite, and any quadrilateral that is both a kite and parallelogram is a rhombus.

A rhombus is a tangential quadrilateral.

That is, it has an inscribed circle that is tangent to all four sides..

## What is a 9 sided shape called?

enneagonIn geometry, a nonagon (/ˈnɒnəɡɒn/) or enneagon (/ˈɛniəɡɒn/) is a nine-sided polygon or 9-gon. The name nonagon is a prefix hybrid formation, from Latin (nonus, “ninth” + gonon), used equivalently, attested already in the 16th century in French nonogone and in English from the 17th century.

## What is eleven sided polygon called?

hendecagonIn geometry, a hendecagon (also undecagon or endecagon) or 11-gon is an eleven-sided polygon. (The name hendecagon, from Greek hendeka “eleven” and –gon “corner”, is often preferred to the hybrid undecagon, whose first part is formed from Latin undecim “eleven”.)

## Does a rhombus have 4 right angles?

A rhombus is defined as a parallelogram with four equal sides. Is a rhombus always a rectangle? No, because a rhombus does not have to have 4 right angles. Kites have two pairs of adjacent sides that are equal.

## Is a trapezoid a rectangle?

NO. A trapezoid is defined (in North America) to be a quadrilateral that has exactly one pair of parallel sides. … A quadrilateral with two pairs of parallel sides is called a parallelogram; a parallelogram with right angles is a rectangle.

## Why is a rhombus not a regular polygon?

A rhombus meets one of the requirements: it is equilateral. But, all of a rhombus’s angles are not the same. It is not equiangular, so it is not a regular polygon. … It has two sets of equal angles, but all of its angles are not equal.

## What’s a 6 sided shape called?

hexagonA five-sided shape is called a pentagon. A six-sided shape is a hexagon, a seven-sided shape a heptagon, while an octagon has eight sides…

## What’s a 12 sided shape called?

dodecagonIn geometry, a dodecagon or 12-gon is any twelve-sided polygon.

## What is not a regular polygon?

An irregular polygon is any polygon that is not a regular polygon. It can have sides of any length and each interior angle can be any measure. They can be convex or concave, but all concave polygons are irregular since the interior angles cannot all be the same.

## Is a triangle a regular polygon?

The triangle, a type of polygon has 3 special types. An equilateral triangle is a regular polygon. It has all the same sides and the same angles. An isosceles triangle has two equal sides and two equal angles.

## Which shape is a regular polygon?

pentagonA polygon is regular when all angles are equal and all sides are equal (otherwise it is “irregular”). This is a regular pentagon (a 5-sided polygon).

## What is a 100 sided shape called?

hectogonIn geometry, a hectogon or hecatontagon or 100-gon is a hundred-sided polygon. The sum of all hectogon’s interior angles are 17640 degrees.

## Why is a cross not a regular polygon?

For a polygon to be ‘regular’ it must have all sides the same length and all interior angles the same. The figure above is actually an example of an equilateral polygon since it has all sides the same length, but it is not a regular polygon because its interior angles are not all the same.

## Can a polygon have an open side?

But first, we need to know what polygons are: polygons are several straight segments placed together. Polygons can be classified as open or closed. A polygon is open when the segments do not all connect at the beginning and end.

## Is a rhombus an irregular shape?

A regular polygon must be equilateral (all of its sides are the same length) and equiangular (all of its angles are the same measure). A rhombus is equilateral: all of its sides are of the same length. … A rhombus can never be a regular polygon because it is not equiangular.