Math · CirclesVISUAL DISCOVERY 09 OF 1,100
Two Radii Across
Starter · about 6 minutes · a little curiosity goes a long way
For grown-ups
Today’s little discovery
A radius reaches from the center to the rim. A diameter crosses from rim to rim through the center, so it contains two radii.
Use the words from-center and through-center carefully.
This is a learning model. Try the take-home activity together.Voice settings
Using Heart (en-US).
Your selected voice and opening narration get ready when the page opens with Sound on. The first visit downloads a voice model (about 92 MB), which your browser can cache. No lesson text is sent to a speech service.The sample plays once and does not change the Sound on/off setting.- Wonder
- Guess
- Try it
- Discover
- Celebrate
HERE’S A LITTLE WONDER…
How many radii stretch all the way across the center?
Two equal spokes meet tip to tip at the wheel hub.
No rush. Try an idea and see.