Know that a rectangle is a four-sided polygon with four right angles
I can identify a rectangle as a four-sided polygon with four right angles.
Know that a rectangle is a four-sided polygon with four right angles
I can identify a rectangle as a four-sided polygon with four right angles.
Lesson details
Key learning points
- A polygon is a 2D shape made up of 3 or more sides.
- A rectangle is a 4-sided polygon with 4 right angles.
- A 4-sided shape with fewer than 4 right angles is not a rectangle.
- A right angle is marked with a symbol inside the angle.
Common misconception
Pupils need to look at the interior angles in the shape. They may think that an interior angle of 270° is a right angle.
Explain to pupils that we need to measure the interior angles of a shape. Show them examples of this (e.g. an arrowhead) to illustrate.
Keywords
Polygon - A polygon is a 2D shape made up of 3 or more straight sides.
Rectangle - A rectangle is a 2D shape with four straight sides and four right angles.
Equipment
Pupils may need access to the following resources: right angle measurers, mirrors, rulers and scissors.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
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Starter quiz
6 Questions
Exit quiz
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