Checking and securing understanding of area for standard shapes | Maths

Starter quiz

The __________ is the size of the surface and states the number of unit squares needed to completely cover that surface.

angle

area ✓

mass

perimeter

volume
Which are units of area?

cm

cm² ✓

cm³

square feet ✓

litres
The area of a rectangle with base 5 cm and a height of 3 cm is ______ cm².

'15' ✓
The perimeter of a rectangle with base 5 cm and a height of 3 cm is ______ cm.

'16' ✓
The perimeter of the rectangle is ______ m.

'14' ✓
The area of the rectangle is ______ m².

'12' ✓

Exit quiz

A ______ is a quadrilateral with exactly one pair of parallel opposite sides.

'trapezium' ✓
Match each shape to the formula for its area.

parallelogram

⇔

$A = bh$ ✓

trapezium

⇔

$A = \frac{1}{2} \times (a + b)h$ ✓

triangle

⇔

$A = \frac{1}{2} bh$ ✓
The area of the parallelogram is ______ cm².

'60' ✓
Which calculation would find the area of this triangle?

$6 \times 6$

$6 \times 8$

$\frac{1}{2} \times 6 \times 6$ ✓

$\frac{1}{2} \times 6 \times 8$
The area of the shape is ______ units².

'36' ✓
PQR is a right-angled triangle. Work out the area of the triangle..

24 cm²

216 cm² ✓

270 cm²

432 cm²

540 cm²

Worksheet

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Presentation

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Lesson Details

Key learning points

The formula for the area of a rectangle is bh
The formula for the area of a parallelogram is bh
The formula for the area of a triangle is bh ÷ 2
The formula for the area of a trapezium is ((a+b)h) ÷ 2

Common misconception

Pupils might find the area of parallelograms and triangles by multiplying the length of two adjacent edges which are not perpendicular.

Calculating the area of a shape involves multiplying two perpendicular lengths. These may not be horizontal and vertical in the shape's initial orientation.

Keywords

Area - The area is the size of the surface and states the number of unit squares needed to completely cover that surface.
Trapezium - A trapezium is a quadrilateral with exactly one pair of parallel opposite sides. The plural of trapezium can be referred to as trapezia or trapeziums.