Investigate the shapes made when rectangles are cut on the diagonal
I can describe the shapes made when rectangles are cut on the diagonal.
Investigate the shapes made when rectangles are cut on the diagonal
I can describe the shapes made when rectangles are cut on the diagonal.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- An angle can be exactly a right angle.
- An angle can be less than or greater than a right angle.
- When you cut a square using two diagonal lines, you get four identical triangles.
- When you cut a rectangle that is not a square using two diagonal lines, you get two pairs of identical triangles.
Keywords
Diagonal - A straight line connecting one vertex to another, but is not the side or edge.
Common misconception
Pupils may find it hard to recognise when an angle is greater than a right angle.
You can model this by trying to move the obtuse angle (though pupils don't need to know the term yet) within a right angle checker. They should be able to see that it is too large to fit.
Licence
This content is © Oak National Academy Limited (2025), licensed on
Lesson video
Loading...
Starter quiz
6 Questions
A four-sided polygon with 4 right angles.
Any four-sided polygon.
A four-sided polygon with 4 right angles and 4 equal sides.
diagonal
vertical
horizontal
Exit quiz
6 Questions
