Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -




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Topic review (newest first)

2013-05-19 00:55:36

Ricky? sad He's gone

John E. Franklin
2013-05-14 13:39:44

since a line segment or "edge" has two ends, then yes, 1/2 is the formula.  v=dots  d=ends of lines on a dot.   e=#ofline segs
Pretty obvious really if you draw a few.  but to prove it, ask Ricky.

2013-05-02 15:06:22

If G is a regular graph and d, e and v denote the degree, the number of edges and the number of vertices respectively, then e = dv/2.

Prove the above statement

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