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Geometric Shapes:
The Basics
by Colleen Wagner
# Geometric Shapes:
The Basics

## Regular Octagon: Polygon with
eight sides of equal length.

### This stop sign is an example of a regular octagon.

## Regular Decagon: A polygon with
ten sides of equal length.

### This is an example of a regular decagon.

## Quadrilaterals: A geometric shape with
four sides and angles.

### Parallelogram: Quadrilateral with opposite
sides parallel.

### Trapezoid: Quadrilateral that has at least
one pair of parallel sides.

### Kite: Quadrilateral with two distinct pairs
of congruent adjacent lengths.

### Square: Rhombus with a right angle.

### Rhombus: Quadrilateral where all sides
have equal length.

## Triangles: Polygon with three sides
and three interior angles.

### Equilaterial Triangle: Polygon in which all
three sides and three angles are congruent.

### Isosceles Triangle: Polygon where only
two sides and two angles are congruent.

### Right Triangle: Polygon that has exactly
one right angle.

## Regular Hexagon: Polygon that has
all six sides of equal length.

### This is an example of a regular hexagon.

## Pentagon: A polygon with
five sides.

### This soccer ball has examples of
pentagons.

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The U.S. flag is an example of a parallelogram.

This is an example of a trapezoid.

The kites we played with as children is a great example.

This Rubik's Cube is an example of many squares.

This is an example of a rhombus.

This crossing sign is an equilateral triangle.

The roof of this house is an isosceles triangle.

This is an example of a right triangle.