Ages 12–18
BrainteenAges 13–18MathsWorksheet
Circles: area and circumference (Challenge with decimals) · Practice set 1
This is a preview. Print it for the full page.
Print or play free — create account
No card needed.I already have an account
Use π = 3.14. Give your answers to 2 decimal places (areas in cm², lengths in cm).
Curriculum links
- Common Core 7.G.B.4: Know and use the formulas for the area and circumference of a circle.
- England NC Y6.MA.GP.4: Name the parts of a circle (radius, diameter, circumference) and know the diameter is twice the radius.
- England NC KS3.MA.GEO.2: Calculate perimeters of 2-D shapes (including circles) and areas of circles and composite shapes.
- BNCC EF07MA33: Establish π as the ratio of a circle's circumference to its diameter and use it to solve problems.
- BNCC EF08MA19: Solve area problems for quadrilaterals, triangles and circles using area formulas.
- Programmes FR C3.MA.GM.1: Calculate the perimeter of polygons and the length of a circle.
- Programmes FR C4.MA.GM.1: Calculate perimeters and areas of usual shapes, including the disc.
Related sheets
Ages 13–18
Ages 12–18
Ages 13–18
Ages 13–18
Ages 12–18
About this activity
What your child practises
Skills: Area and circumference of circles (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.
- Play it on screen for instant feedback, then print a fresh version as a timed, calculator-free check.
- Encourage teens to set their own target (say 12 out of 15) and track it over a few attempts.
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