Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #2 20121214 03:11:27
Re: Triangle PQRhi jacks You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #4 20121214 07:20:52
Re: Triangle PQROk. Let's say P is (a,b) Q is (c,d) and R is (e,f) and centroid is the {rationals} are closed for +,  , x and ÷ ie. adding two fractions, or subtracting one fraction from another, or multiplying two fractions or dividing them will always give another fracftion. Therefore both the midpoint and the centroid have rational coordinates. Bob You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei 