Euclid S Proposition 13 Linear Pair Theorem

Euclid's Proposition 13

This is the thirteenth

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A step-by-step board presentation of Book 1,

If a straight line stands on a straight line, then the two angles it makes with the straight line sum up to 180 degrees.

https://www.patreon.com/Mathoma Heath's translation of

Euclid’s Proposition 27

Here, with some struggling (just woke up!) the groundwork is being laid down towards proof of the next major

Mr Burnham's step by step board presentation of Book 3,

Supplimentary angles are equal to two right angles.

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This is the twenty seventh

Euclid's Proposition

Mr Bradley's step by step board presentation of Book 2,

Cosine law a^2 = b^2 + c^2 - 2ab cos(theta), for acute triangles.

Find a mean proportional of two numbers (A:B = B:C, B is the mean proportional of A and C)

If two lines cross, the

Euclid's

This is approved from