The Real Numbers
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
The real numbers are all the numbers on the number line: every rational number and every irrational number, with no gaps.
Show
A ruler's edge is a picture of the set: 2, −3, ½, and π each mark one point, and every point marks one number.
Builds on
- Nothing — this is a starting point.
Unlocks
- Nothing yet depends on this.