Triangles

If I tell you two sides of a right-angled triangle, you can easily work out the third. But what if the angle between the two sides is not a right angle?

Sara and Will were sorting some pictures of shapes on cards. "I'll collect the circles," said Sara. "I'll take the red ones," answered Will. Can you see any cards they would both want?

This activity focuses on similarities and differences between shapes.

Can you each work out what shape you have part of on your card? What will the rest of it look like?

Weekly Problem 8 - 2010
Are you able to find triangles such that these five statements are true?

I cut this square into two different shapes. What can you say about the relationship between them?

What do you think is the same about these two Logic Blocks? What others do you think go with them in the set?

Watch this "Notes on a Triangle" film. Can you recreate parts of the film using cut-out triangles?

What do these two triangles have in common? How are they related?

In how many ways can you fit two of these yellow triangles together? Can you predict the number of ways two blue triangles can be fitted together?