Composite figures
Splitting figures into simple shapes to find area and perimeter. Read one part at a time and tap “I know this”. Then test yourself in the quiz.
Know it already? Jump straight to the quiz
Composite figures
- Split the figure into simple shapes (rectangles, triangles).
- Work out each part’s area.
- Add the parts (or subtract a cut-out part).
An L-shape made of a rectangle of 8 cm × 5 cm and one of 3 cm × 2 cm: area = 40 + 6 = 46 cm².
For the perimeter count only the outside edge, not the lines where you split it.
Shapes inside shapes
Count triangles or squares in a figure systematically: first the small single ones, then those made of two, then bigger ones.
Remember this and test yourself
- Split into rectangles and triangles.
- Add the areas.
- Perimeter: only the outside edge.
- Count shapes systematically: small to big.
Write these points in your book. Read them again the night before the test.
Cut, calculate, combine.
Important words
First say the answer yourself, then turn the card over.
Match column A to column B
Tap a word in column A, then its meaning in column B. You can also start in column B.
Now the real quiz!
The quiz has many more questions on this topic. Every question shows straight away whether you are right and explains why.
Take the quiz: Composite figures- Let your child work the examples on paper and explain them to you.
- The ticks (“I know this”) are saved on this device only. We never ask for names or emails.
Follows CAPS for Grade 7 Mathematics. Always check your teacher’s notes and textbook too.