College Algebra / Unit 1 Alg 005 short lesson, about 20 seconds
Irrational Numbers
Captions available
The idea
An irrational number is a real number that no fraction of two integers equals; its decimal form never ends and never repeats.
In practice
π begins 3.14159 and never settles into a repeating block; √2 does the same. Between them sit infinitely many more.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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