Page 227 - Math Smart - 7

Investigate!

Orientate the 2D shapes so that they fit in the grid provided.
O You will receive a set of 2D shapes from your teacher.
Q Arrange and place the 2D shapes on your grid so that they all fit into
the grid, with no gaps and no overlapping of shapes. Try different
orientations of the 2D shapes.
Q Two 2D shapes have already been placed for you.

How would you name these shapes?

Polygons

A polygon is a two-dimensional closed shape with straight sides. It is a closed
figure.

All the sides are joined up. The lines cross each other.
They do not cross. This is a polygon. This is not a polygon.

Many polygons are named according to the number of sides they have. For
example, triangles have three sides, quadrilaterals have four sides, pentagons
have five sides, hexagons have six sides and octagons are eight sided polygons.

Each of the shapes below have 5 sides and 5 vertices. They are pentagons.

vertex

Each shape below has 6 sides and 6 vertices. They are hexagons.

Each shape below has 7 sides and 7 vertices. They are heptagons.

Each shape below has 8 sides and 8 vertices. They are octagons.