New
New
Year 3
Investigate and draw other polygons with right angles
I can investigate right angles in shapes with more than four sides.
New
New
Year 3
Investigate and draw other polygons with right angles
I can investigate right angles in shapes with more than four sides.
Lesson details
Key learning points
- Polygons with more than four sides can contain a right angle.
- Polygons with more than four sides can contain more than one right angle.
- Shapes can be drawn to match a description including angles and numbers of sides.
Common misconception
Pupils may find it hard to recognise right angles presented in unusual orientations.
Encourage pupils to continue to check angles with a right angle measurer. Teach them to recognise where vertices are clearly not right angles and differentiate these from ones that could be right angles.
Keywords
Pentagon - A 2D shape made up of five straight sides and vertices.
Hexagon - A 2D shape made up of six straight sides and vertices.
This session can be taught practically. Pupils can use geoboards and elastic bands to explore pentagons and hexagons, identifying right angles, and use card strips and split pins to investigate shapes too. Pupils can be presented with strips of different lengths to add further challenge.
Teacher tip
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).
Video
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Starter quiz
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6 Questions
Q1.
Which of these shapes has exactly one right angle?
a
c
d
Q2.
Which of these shapes has exactly two right angles?
a
b
c
Q3.
Which of these shapes does not have any right angles?
Q4.
How many right angles does this shape have?
Q5.
Which of these shapes are not quadrilaterals?
a
c
Q6.
Which statement is correct?
All rectangles are squares.
Rectangles and squares are different because rectangles do not have right angles
Exit quiz
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6 Questions
Q1.
Which shape is a pentagon?
Q2.
Which shape is a hexagon?
Q3.
Look at this pentagon. How many right angles does it have?
Q4.
Look at this hexagon. How many right angles does it have?
Q5.
Aisha uses six sticks of equal length to make the shape below. She says, ‘I’ve made a hexagon with four right angles.’ Is she correct?
Yes, the shape is a hexagon with four right angles.
No, the shape is a hexagon, but it doesn’t have four right angles.
Q6.
Laura chooses three of these shapes. The shapes have a total of five right angles. Which three shapes did she choose?
c