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Posts from 2015/01
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Let us use corresponding and alternate interior angles.- Published on
Euclid's proof is deductive and geometrically creative!- Published on
A classic rearrangement proof attributed to Pythagoras.- Published on
Proof and historical attribution of vertically opposite angles.- Published on
Countable infinity refers to infinite sets whose elements can be listed in a sequence.- Published on
A classic thought experiment that explores infinity.- Published on
The empty set is its own only subset, as it contains no elements to include in any other set.- Published on
A brief overview of two common ways to write sets.- Published on
A unit square is a square with side length 1.