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
- How to Calculate Perimeters: Part 1

Like the site.

Nice and easy to understand,my kids enjoyed it!!!

Thank you Mrs Mercy

Nice lesson,Thank you

Please can you put more shapes???!!!!!

thank you for the lesson!

Thank the lord. I couldn’t tell the difference between square and trapezoid

Thank you for my lesson

Nice!

2D square problem

There are other shapes worth considering.

I enjoyed learning different geometrical shapes

You should tell more about each

Nice

example for square,triangle,circle,rectangle

Like it