What are **geometric plane shapes**? What characteristics do they have? These are the questions that we will answer in this post.

The **principal geometric plane shapes **are:

**The Circle**

The **circle** is a shape that can be made by tracing a curve that is always the same distance from a point that we call the center. The distance around a circle is called the *circumference* of the circle.

**The Triangle**

The **triangle **is a shape that is formed by 3 straight lines that are called sides. There are different ways of classifying triangles, according to their sides or angles.

- According to their angles:

- Right triangle: the largest of the 3 angles is a right angle.
- Acute Triangle: the largest of the 3 angles is an acute angle (less than 90 degrees).
- Obtuse Triangle: the largest of the 3 angles is an obtuse angle (more than 90 degrees).

2. According to their sides:

- Equilateral Triangle: all 3 sides are the same length.
- Isosceles Triangle: it has 2 (or more) sides that are of equal length. (An equilateral triangle is also isosceles.)
- Scalene Triangle: no 2 sides are of equal measure.

**The Rectangle**

The **rectangle** is a shape that has 4 sides. The distinguishing characteristic of a rectangle is that all 4 angles measure 90 degrees.

**The Rhombus**** **

The **rhombus** is a shape formed by 4 straight lines. Its 4 sides measure the same length but, unlike the rectangle, any of all 4 angles measure 90 degrees.

**The Square**

The **square** is a type of rectangle, but also a type of rhombus. It has characteristics of both of these. That is to say, all 4 angles are right angles, and all 4 sides are equal in length.

**The Trapezoid**

The **trapezoid** also has 4 sides. It has two sides that are parallel but the other 2 are not.

You can practice with the geometric plane shapes by registering in Smartick.

### Learn More:

- Geometric Shapes: Characteristics of Triangles
- Discover Geometric Figures Found in Our Environment
- Geometry and 2D Shapes with the Help of a Tangram
- Geometric Shape: Properties of a Square
- Geometric Figures and Straight Lines

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## HerobrineMay 13 2019, 1:04 AM

Thank you for my lesson

## Yola BingaliMar 28 2019, 11:16 AM

Nice!

## Sai KumarDec 22 2018, 11:24 AM

2D square problem

## NewcomerJan 17 2019, 1:54 PM

There are other shapes worth considering.

## AmnaFeb 17 2018, 3:32 AM

I enjoyed learning different geometrical shapes

## SanikaOct 28 2017, 9:58 AM

You should tell more about each

## divyaJul 09 2017, 9:09 AM

example for square,triangle,circle,rectangle