2D Shapes: Learn About Names, Faces, Edges And Vertices
Do you struggle with understanding the different types of 2D shapes? Don't worry, you're not alone. In this article, we will go over the most common 2D shapes, their names, faces, edges, and vertices.
What are 2D Shapes?
2D shapes, also known as flat shapes, are figures that only have two dimensions - length and width. They don't have any depth or thickness. Some examples of 2D shapes are triangles, squares, rectangles, and circles.
Triangles
A triangle is a 2D shape with three sides and three angles. Triangles can be classified based on the length of their sides and the size of their angles. They can be equilateral, isosceles, or scalene. Equilateral triangles have three equal sides, isosceles triangles have two equal sides, and scalene triangles have no equal sides. The angles of a triangle can also be acute, obtuse, or right.
Names of Triangles
Equilateral Triangle - All sides are equal in length.
Isosceles Triangle - Two sides are equal in length.
Scalene Triangle - No sides are equal in length.
Faces, Edges, and Vertices of Triangles
A triangle has three sides, three vertices, and three angles. It has no faces or edges since it is a 2D shape.
Squares
A square is a 2D shape with four equal sides and four right angles. It is a special type of rectangle where all sides are equal in length.
Names of Squares
Square - All sides are equal in length and all angles are right angles.
Faces, Edges, and Vertices of Squares
A square has four sides, four vertices, and four right angles. It has one face and four edges.
Rectangles
A rectangle is a 2D shape with four right angles and opposite sides that are equal in length. It is also a parallelogram since opposite sides are parallel.
Names of Rectangles
Rectangle - Opposite sides are equal in length and all angles are right angles.
Faces, Edges, and Vertices of Rectangles
A rectangle has four sides, four vertices, and four right angles. It has one face and four edges.
Circles
A circle is a 2D shape with a radius that extends from the center to the perimeter. It is the only 2D shape that has no sides or corners.
Names of Circles
Circle - A round shape with no sides or corners.
Faces, Edges, and Vertices of Circles
A circle has no sides, vertices, or edges since it is a 2D shape.
Polygons
A polygon is a 2D shape with straight sides and angles. It can have any number of sides, but it must have at least three.
Names of Polygons
Triangle - Three sides
Square - Four sides
Rectangle - Four sides
Pentagon - Five sides
Hexagon - Six sides
Heptagon - Seven sides
Octagon - Eight sides
Nonagon - Nine sides
Decagon - Ten sides
Faces, Edges, and Vertices of Polygons
A polygon has the same number of vertices and edges as it does sides. It has one face.
Conclusion
2D shapes are an important part of geometry, and understanding their names, faces, edges, and vertices is crucial. By learning about the different types of 2D shapes, you can become more confident in solving geometry problems and understanding the world around you.
So, what are you waiting for? Start exploring the world of 2D shapes today!
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