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Questions on the application of Mathematica to geometric problems. You might also consider adding the [graphics] tag, if appropriate.

1
vote
2answers
In geospace, how do I find coordinates of the vertices of an equilateral triangle whose vertices have integral coordinates? How do I tell Mathematica to do that?
asked Sep 9 '12 by minthao_2011
11
votes
5answers
I want to choose three points $A$, $B$, $C$ has integer coordinates on the circle $$(x+2)^2 + (y+1)^2 = 25$$ so that the triangle is not a right triangle. But I can not. I tried ClearAll[a, b, r]; a …
asked Jun 23 '13 by minthao_2011
12
votes
2answers
I want to find the numbers $a$, $b$, $c$, $d$ of the function $y = \dfrac{a x + b}{c x + d}$ so that the triangle $ABC$ with three points $A$, $B$, $C$ have integer coordinates and lies on the graph …
asked Sep 14 '13 by minthao_2011
2
votes
My student found a function $y = \dfrac{93 x + 6}{x+2}$. Then, $A(-6,138)$, $B(8,75)$, $C(-62,96)$ and centroid $G(20,103)$. And he found a general formulas in order to find the coefficients $a$, $b$, …
answered Sep 16 '13 by minthao_2011
6
votes
2answers
The measure of the interior angles of a triangle are $15^\circ$, $30^\circ$, $135^\circ$ and the length of one edge is 3. In order to determine the length of the remaining two edges, I've tried a : …
asked Nov 10 '12 by minthao_2011