Math · AreaVISUAL DISCOVERY 03 OF 1,100
Slide a Slant into Place
Builder · about 6 minutes · a little curiosity goes a long way
For grown-ups
Today’s little discovery
Moving the left wedge to the right changes the outline into a rectangle without adding or losing material. Its width is the base and its upright height is the perpendicular height.
Ask whether any paper was added during the slide.
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…
Can a slanted shape keep its area when a corner moves?
A leaning bookcase-shaped tile has a wedge that fits perfectly on its other side.
No rush. Try an idea and see.