How many different sets of four dots
can be joined to form a square?
A printable sheet for student use is available here
Tweet about this starter  Share 
Topics: Starter  Puzzles  Shape
How did you use this starter? Can you suggest
how teachers could present or develop this resource? Do you have any comments? It is always useful to receive
feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
Click here to enter your comments.
If you don't have the time to provide feedback we'd really appreciate it if you could give this page a score! We are constantly improving and adding to these starters so it would be really helpful to know which ones are most useful. Simply click on a button below:
This starter has scored a mean of 3.6 out of 5 based on 344 votes.
Previous Day  This starter is for 12 April  Next Day
There is a printable worksheet to go with this activity.
4 green, 5 black, 1 red and 1 blue
How many rectangles can be found by joining four dots on the grid?
How many triangles can be found by joining three dots on the grid?
How many polygons can be found by joining dots on the grid?
What are the areas of the polygons that can be found?
Assume that the horizontal and vertical distances between the dots are one unit and the dots are symmetrically positioned.
Teacher, do your students have
access to computers? 

Here is the URL for a concise version of this page without comments or answers.
Here is the URL which will take them to a different type of counting activity.
Other shape counting starters:
How Many Squares 1?
 How Many Squares 2?
How Many Triangles 1?

How Many Triangles 2?  How Many Triangles 3?
How Many Rectangles?
 Rectangles Investigation 
Icosahedron 
Mystic Rose