All lessonsSource
📐 Mathematics 12 minLesson 14 of 50
Circles
Circumference, area and the named parts of a circle.
What you will learn
- The diameter is twice the radius.
- Circumference equals 2πr.
- Area equals πr², so double the radius gives four times the area.
Math Antics - Circles, Circumference And Area
mathantics · plays in StudyAI
Watch once, then work through the practice sheet.
Practice sheets
3 printable PDFs1
Recall drill
5 questions · write-in answer lines
2
Apply it
4 questions · write-in answer lines
3
Test yourself
4 questions · write-in answer lines
Interactive quiz
Question 1 of 2Circumference with radius 5 (π ≈ 3.14)?
