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.