Saturday, 23 October 2010

Year 6 Explore angles and Investigate Triangles...

What is proof?

Proof in mathematics means that a convincing demonstration has been carried out mathematically, using logical steps. Mathematical ideas are tested several times to see if they hold true in any situation, then a statement is made. The statement that is provided is often called a theorem.

In our case we are looking at the angles in a triangle. The theory is that the sum of the angles in a triangle equal 180°.

Some Year 6's decided to investigate and test the theory –

The enquiry questions were:

  • Do all the angles of a triangle add up to 180 degrees no matter how you draw it? Can you write up your findings?
  • Explain your methods (Say what and how you did it)
  • How you arrived at your answers?
  • Record your results as evidence to support your conclusions (What you found out)
  • What conclusions can you draw from your results?
Here are useful links from the web to help you with your investigation report.  Click on Exploring angles within a triangle and also scroll down and follow the links for the interative games.  See below. (The video sounds a bit robotic! However it is interesting kids!)

Shape Classification - Interactive learning game

So year 6   Did you take on the challenge and explore? What did you find out?  Let me know leave your comments...

Hey try out these Triangle Teasers. How many can you see?


  1. Holly,Ellise and Ellie-Bree05 November, 2010

    We think there is 21 triangles in the top one!

  2. i think there is 18 triangles.

  3. Sophie and Lauren05 November, 2010

    I think there are 21 triangles in the top one !!!!!!!

  4. Its actually funny to listen to everyone saying how many triangles there are

  5. I think there are 24 for the first one !

  6. i think there is 24 triangles in the top one !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  7. i think there is 24 triangles inthe top one!