Know that a rectangle is a four-sided polygon with four right angles | Maths

Starter quiz

Which symbol is used to show a right angle?
- a
- b ✓
- c
- d
Which of these shapes are rectangles?
- a
- b ✓
- c
- d ✓
Which of these shapes are not rectangles?
- a ✓
- b
- c ✓
- d
Which of these statements are true for all rectangles?
- They have 4 right angles. ✓
- They only have one line of symmetry.
- They have 4 straight sides. ✓
- They have 4 sides the same length.
How many right angles does this shape have?
- '5' ✓
How many right angles in total do these 3 shapes have?
- '7' ✓

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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.

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.