What Is a Two-Dimensional Shape?

Geometry helps people understand the world around them.
••• Ryan McVay/Photodisc/Getty Images

Geometry is the mathematical study of size, shapes and planes. Part of geometry is the different dimensions as they are represented by axises. A two-dimensional figure is drawn on the x- and y-axises, and a three-dimensional figure is drawn on the x-, y-, and z-axises. While there are many two-dimensional figures, this guide will explain the features of a two-dimensional shape.

Comprised of line segments

A shape is comprised of line segments. A line segment is finite and is a straight line connecting two points. These line segments are joined together to enclose an area.

Has more than two sides

To be a shape, the figure must be comprised of more than two segments. If a figure has only two line segments, it is only an angle. A figure with three or more sides is called a polygon. Some polygons have specific names; for example, a three-sided figure is called a triangle and a four-sided figure is called a rectangle.

Has angles

All polygons have interior angles. These angles help determine what kind of polygon the shape is. Angles are measured in degrees. For example, if the length of the sides and interior angles are the same, then it is a regular polygon. If the length of the sides and the interior angles are different, then it is an irregular polygon.

Has area

The space that is enclosed within the shape is called the area. All shapes have area, though the equations to calculate to find area differ from shape to shape. For example, you calculate the area of a rectangle by multiplying the height by the width and a triangle by multiplying one half of the base by the height.

Related Articles

How to Calculate Area of an Obtuse Triangle
How to Calculate the Perimeter of Quadrilaterals
Interesting Facts About Triangles in Math
How to Find Angles in a Trapezoid
How to Calculate the Area of an Oval
How to Solve a Hexagon
How to Calculate the Volume and Circumference of a...
How to Find the Volume of a Parallelogram
Which Quadrilaterals Have Four Right Angles?
How to Calculate Arc Area
How to Learn 3 Dimensional Shapes
How to Calculate Area and Perimeter
How to Figure Degrees in an Octagon
How to Find the Perimeter of Different Shapes
How to Calculate the Area of an Equilateral Triangle
What Are the Subsets of a Line in Geometry?
What Are the Degrees of a Quadrilateral?
Difference Between Vertices & Edges
How to Find the Area of a Polygon
How to Calculate Quadrilateral Area

Dont Go!

We Have More Great Sciencing Articles!