CirclesLesson 3 of 8
Area of a circle: slice it into a rectangle
Cut a circle into thin slices and lay them head to tail: a rectangle πr by r. A 7 cm circle covers 154 cm².
Locked
Unlock the rest of Junior Mathematics: arithmetic and geometry foundations.
- Every lesson, every resource, unlocked instantly.
- Track progress and pick up where you left off.
- Free preview lessons stay readable from the outline.