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BrainteenFree
Area of 2D shapes (Challenge with decimals) · Practice set 2
Find each area. Give your answers in cm².
- Ages 13–18
- Maths
- Worksheet
Curriculum links
- Common Core 6.G.A.1: Find the area of right triangles, other triangles, special quadrilaterals and polygons by composing and decomposing shapes.
- Common Core 7.G.B.6: Solve problems about area, volume and surface area of 2D and 3D objects made of triangles, quadrilaterals, polygons, cubes and right prisms.
- England NC KS3.MA.GEO.1: Use formulae for the perimeter and area of triangles, parallelograms and trapezia, and the volume of cuboids and other prisms (including cylinders).
- BNCC EF08MA19: Solve area problems for quadrilaterals, triangles and circles using area formulas.
- Programmes FR C4.MA.GM.1: Calculate perimeters and areas of usual shapes, including the disc.
Licence: Crayonbird original
About this activity
What your child practises
Skills: Area of triangles and quadrilaterals (level 3).
Applying a method step by step and checking the answer – the skills secondary-school maths tests are built on.
What’s included
- 15 questions
- An answer key you can print with the sheet or on its own
- An on-screen version with instant marking and stars
Age and school year
Made for ages 13–18. That’s Grade 8–12 in the US, Year 9–13 in England, JSS 2 – SS 3 in Nigeria and Class 8–12 in India.
How to use it
- Print it at home or school – it fits a standard A4 or US Letter page.
- Print the answer key too, so marking takes seconds.
- Play it on screen: answers are marked instantly and children earn stars.
- Write on it on a tablet or touchscreen with a finger or stylus – no printer needed.
Tips for parents and teachers
- Ask for the working, not just the answer – in exams, clear method earns marks even when the answer slips.
- Redo three of the questions a week later: spaced recall is one of the surest ways to make methods stick.
- Combine this sheet with past exam questions on the same topic for mixed, exam-style practice.
Good to know
- Time needed
- About 20–30 minutes
- You’ll need
- A printer (or a tablet to work on screen), a pencil and an eraser
- Difficulty
- Harder (Challenge with decimals) – pitched at ages 13–18
- Answer key
- Yes – print it with the sheet or on its own
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