How many triangles can you count in this diagram?
Click the yellow button to find out.
Topics: Starter | Combinations | Problem Solving | Shape
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The important thing is not the answer but the method you used to arrive at the answer. Did you have a structured approach? Were you sure that you had the right answer?
There is a printable worksheet to go with this activity for Transum subscribers.
Can you make up a puzzle like this for others to solve?
How many triangles are on the front of this hotel reception desk?
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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
Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments:
However it would be better to assign one of the student interactive activities below.
Here is the URL which will take them to a related student activity.