Challenge #161: Triangles, Triangles, Triangles

[DawnDuong]

I used a non-macro approach, mainly relying on the geometrical rules. I initially had 544 instead of 516. The difference is due to very thin triangles. So it is an interesting case of which tolerance level to set to test for linearity.

[kelly_gilbert]

Interesting! I definitely never would have thought to use that method for creating the triangle shapes (or for finding unique combos!) My method was definitely more steps (but works).

Spoiler

I initially tried to exclude invalid triangles (where the points were all collinear) by using the side lengths, but spatial length/area don't work because these are lat/lons rather than cartesian coordinates!

[AmandaCarew]

Great challenge! So many different ways to solve.

[GiuseppeC]

Nice one!

Not sure why people are filtering out small triangles at the end. I have used...

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the Spatial Info tool to tell polygons (i.e. triangles) from lines and I get 540 triangles!

[JosephSerpis]

Challenge Completed 

[LukeM]

Some clever logic required!

[Verakso]

Thanks to @CharlieS for fun challenge

I do love a great Spatial

So all though this was super fun, I did have some minor challenges with it

Spoiler

My result does not completely match the provided output, and I cannot quite figure out how to match it 100%, but I do get 516 unique triangles
My WorklowAs mentioned there is a difference

The Provided ResultMy Result

so I guess I will have to take a look at some of the other solutions to see, it there is a more clever way to do this

Still Climbing

/Verakso

[estherb47]

Really fun challenge!!

Spoiler

Had to wrap my head around how to get the points connected in a unique way, and then the ideas flew quickly.

Decided to go the non-spatial tool route to practice spatial formulae. The workflow:


Lots of triangles!

[PhilipMannering]

Very nice challenge. I got my 516 triangles

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wf

[dimark]

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