shape on a plane
A plane does not always fly through the air.
It does not always carry people from one place to another.
In math, a plane is a flat area. It is home to many different kinds of geometric shapes.
Let's take a look at some of the most common geometric shapes
At first the circle does not look like it belongs with the other shapes
They all have straight edges and sharp corners
A circle has curves
Did you know the angles you find inside the corners of the other shapes are measured with a circle
An angle's measurement tells how much of a circle it is
So circle does belong
A triangle has three sides
It also has three angles
it has three vertices,too
there are different kinds of triangles
They are named for the lengths of their side and size of their angles
A rectangle has four sides and four right angles
Right angles make the corners perfectly square
if all the sides of a rectangle are the same length
It is a special kind of rectangle
You may know it by its more common name a square