Myths about teaching can hold you back
- Year 8
Checking understanding of area
I can find the area of triangles, quadrilaterals and composite rectilinear shapes.
- Year 8
Checking understanding of area
I can find the area of triangles, quadrilaterals and composite rectilinear shapes.
Lesson details
Key learning points
- The formula can be used to find the area of a triangle.
- There can be more than one way to find the area of a trapezium.
- The area of composite shapes can be found by splitting into shapes whose area can be found.
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.
Trapeziums/trapezia - The plural of trapezium can be referred to as trapezia or trapeziums.
Composite rectilinear shape - A composite rectilinear shape is a composite shape made from rectangles.
Common misconception
Pupils may find the area by multiplying lengths which are not perpendicular.
Area is measured in square units. The base and height of a square are perpendicular. We multiply perpendicular lengths to make square units.
To help you plan your year 8 maths lesson on: Checking understanding of area, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 8 maths lesson on: Checking understanding of area, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 3 maths lessons from the Perimeter, area and volume unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.The is the size of the surface and states the number of unit squares needed to completely cover that surface.
Q2.Which of these units are a measure of area?
Q3.The area of the rectangle is m$$^2$$.
Q4.Which line segments are perpendicular to each other?
Q5.For which shape can the area be calculated by doing $${1}\over{2}$$ $$\times$$ base $$\times$$ perpendicular height?
Q6.Select the rectangle with the largest area.
Assessment exit quiz
6 Questions
Q1.The area of the rectangle is units$$^2$$.
Q2.The area of the parallelogram is units$$^2$$.
Q3.The area of the triangle is units$$^2$$.
Q4.A is a quadrilateral with exactly one pair of parallel opposite sides.
Q5.The formula $$A=$$ $${1}\over{2}$$ $$\times (a + b) \times h$$ can be used to calculate area of a trapezium. Which calculation is correct for finding the area of the trapezium?
Q6.This compound shape is made from a rectangle and a triangle. Its area is units$$^2$$.
