The Important Thing About Shapes

Written by: K. Gooding

The important thing about a geometric shape is that it can be 2-dimensional or 3 dimensional.

A 2-dimensional shape has length and width.

A polygon is a 2-dimensional shape with 3 or more sides.

A triangle is a polygon with 3 sides and 3 angles.

A quadrilateral is a polygon with 4 sides and 4 angles.

But the important thing about a geometric shape is that it can be 2-dimensional or 3 dimensional.

length

width

square

rhombus

length

width

triangle

triangle

3 angles

The important thing about a geometric shape is that it can be 2-dimensional or 3 dimensional.

Polygons and quadrilaterals are all around us.

A rectangle is a quadrilateral with 4 sides and 4 right angles for corners.

A square is a quadrilateral with 4 equal sides and 4 right angles.

Windows, chalkboards, and floor tiles are quadrilaterals.

But the important thing about a geometric shape is that it can be 2-dimensional or 3 dimensional.

rectangle

Right angle

square

Right angle

4 equal sides

The important thing about a geometric shape is that it can be 2-dimensional or 3 dimensional.

But the important thing about a geometric shape is that it can be 2-dimensional or 3 dimensional.

A 3-dimensional shape has length, width, and height.

A rectangular prism is a 3-dimensional shape with 6 faces that are each a rectangle.

A block, a brick, and a box are rectangular prisms.

The important thing about a geometric shape is that it can be 2-dimensional or 3 dimensional.

But the important thing about a geometric shape is that it can be 2-dimensional or 3 dimensional.

Both 2-dimensional and 3-dimensional shapes can be symmetric.

Symmetric shapes have a line of mirror symmetry.

The shape is exactly the same on both sides of the line.