RicardoCruz
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 Apr19 comment Cabri 3D - Rotating a triangle Are $T$ and $T_0$ given and you must find out the line $AB$? Jan9 comment Centroids and Harmonic Means I think you mean one of them is HALF of the harmonic mean of the others. Don't you? Jan6 comment In the regular hexagon tell each area,But How find this length with $B_{i}B_{i+1}$? @HandeBruijn Very good. It's really astonishing to get an exact answer. +1. Jan6 comment In the regular hexagon tell each area,But How find this length with $B_{i}B_{i+1}$? @HandeBruijn Check the value of $x$. $x$ is not $45.27468489$. Jan5 comment In the regular hexagon tell each area,But How find this length with $B_{i}B_{i+1}$? $x$ cannot be more than $2*A_1A_2$. Dec27 comment In the regular hexagon tell each area,But How find this length with $B_{i}B_{i+1}$? If the hexagon were regular, then its total area $A$ should be: $A=6 \frac{L^2 \sqrt{3}}{4}$. As $L= |A_1A_2|=15$ , the area should be $A=\frac{675 \sqrt{3}}{2}$, but adding up all the given areas we get 15210?! Dec26 comment Finding Locus of a Midpoint of a Chord @Pakquebchsoflwty By the converse of Thales Theorem the circle whose diameter is $OY$ is unique and $M$ is a point of this circle.The "lowest" position where $M$ can be is when $C$ is on $A$ or on $B$.In this case the smaller square becomes a point and the bigger square has its center on $Y$. $M$ will be the midpoint of $DC$ or $EC$ and $M$ will be a point of the perpendicular bisector of $YO$. Therefore $M$ is a point of the upper half semicircle. – RicardoCruz 1 hour ago Dec26 answered Finding Locus of a Midpoint of a Chord Dec23 awarded Informed Dec20 comment Geometry construction problem @RoryDaulton You're welcome. I'm happy to help. Dec20 comment Geometry construction problem There is something that doesn't fit in the equation you got. I think the second term of the RHS should be $2 \sqrt{r^2-(d-z)^2}$. If you correct it, you will get a quadratic equation. Dec19 awarded Constituent Dec18 comment Construct quadrangle with given angles and perpendicular diagonals @HandeBruijn Since the OP wanted a compass-and-straightedge construction I thought it would be easier use equation(4) as it is. But it is possible to use another method (a graphical or algebraic one) to solve equation (4). Dec17 revised Construct quadrangle with given angles and perpendicular diagonals added 6 characters in body Dec17 revised Construct quadrangle with given angles and perpendicular diagonals added 110 characters in body Dec17 answered Construct quadrangle with given angles and perpendicular diagonals Dec16 revised Requiring a Geometrical proof adding most known terms Dec16 answered Requiring a Geometrical proof Dec10 awarded geometry Dec9 revised Easy little geometry prob adding more details