Circles and Pi
by Anonymous
Roll a circle to measure its circumference and compare it with the diameter to discover that pi is always about 3.14.
About this app
Circles and Pi is an interactive elementary math app for exploring radius, diameter, circumference, and pi. Learners adjust circle dimensions, roll a circle one full turn with a slider, and complete guided missions to discover that the diameter is twice the radius and that circumference divided by diameter is about 3.14.
Use cases
- Elementary students learning circle vocabulary
- Sixth-grade math practice on radius and diameter
- Teachers demonstrating circumference through motion
- Learners practicing the relationship between circumference and diameter
Features
- Three tabs covering circle parts, rolling a circle, and pi
- Adjustable radius and diameter controls
- Slider animation for rolling a circle one full turn
- Formula displays for diameter, circumference, and circumference divided by diameter
- Four guided missions in each learning section
- Visual diagrams labeling the center, radius, diameter, and circumference