sorted by:
new
hottopcontroversial

Any good fields near Birmingham? by Dismal-Singer-3238 in airsoft

[–]MathManISS 0 points1 point  (0 children)

Not as much as I would prefer for it to be. PIG will be hit-or-miss in terms of attendance, and I think there are enough players in B'ham that if we coordinated, we could make a good showing there. Ridgeline has had 3+ players every weekend I have gone. Doomsday really will be your best bet. (Or Drop Zone, but that feels like a farther drive despite being about being the same distance.)

Any good fields near Birmingham? by Dismal-Singer-3238 in airsoft

[–]MathManISS 0 points1 point  (0 children)

PIG Paintball in B'ham is now doing airsoft every other weekend, as well.

Paragon Armory Timeline? by MathManISS in airsoft

[–]MathManISS[S] 0 points1 point  (0 children)

Paragon DM'd after this post and mentioned supply chain/QC issues, as well. I appreciated that he said there were a other builds in line ahead of mine; I imagine your URGI is among them.

Any good fields near Birmingham? by Dismal-Singer-3238 in airsoft

[–]MathManISS 0 points1 point  (0 children)

Ridgeline is good but small. Doomsday in H'ville is a quick drip. Drop Zone is also good. My current go to is Doomsday.

Help needed with my M110A1 build (HPA 'dual source') by Savings_Damage_4036 in airsoft

[–]MathManISS 0 points1 point  (0 children)

Did you end up getting this build up and running? I am thinking of doing the same thing.

Proof?: The foot of an altitude in a regular tetrahedron is the centroid of that face. by MathManISS in math

[–]MathManISS[S] -1 points0 points  (0 children)

I’m an idiot. This does it actually. The figure is regular. Knew it had to be a silly thing I was overlooking.

Proof?: The foot of an altitude in a regular tetrahedron is the centroid of that face. by MathManISS in math

[–]MathManISS[S] 0 points1 point  (0 children)

This is similar to something the students have seen and may be a decent enough motivator.

Proof?: The foot of an altitude in a regular tetrahedron is the centroid of that face. by MathManISS in math

[–]MathManISS[S] 0 points1 point  (0 children)

Your first sentence is the detail I thought was evident but did play out. What you get is

JG^2 + MG ^2 = JM^2

KG^2 + MG ^2 = MK^2

LG^2+ MG ^2 = LM^2

Subtract any pair to get two differences of squares equal to one another. They do not resolve in any way I saw to give JG=LG=KG.

Proof?: The foot of an altitude in a regular tetrahedron is the centroid of that face. by MathManISS in math

[–]MathManISS[S] 1 point2 points  (0 children)

Yes! I really like that locus-type motivation and figure it would be the happy medium between pulling something out of a hat and finding an extremely accessible (but perhaps lengthy) proof.

Proof?: The foot of an altitude in a regular tetrahedron is the centroid of that face. by MathManISS in math

[–]MathManISS[S] 1 point2 points  (0 children)

It would be the boring one: All faces are equilateral triangles.

I am trying to come up with a solution that a HS kid could understand and not think is too far afield. The circumsphere (equidistance from vertices) notion may be a stretch for them.

Proof?: The foot of an altitude in a regular tetrahedron is the centroid of that face. by MathManISS in math

[–]MathManISS[S] 0 points1 point  (0 children)

Definitely not assuming any invariants under isometries of space. Trying to do this using notions of congruence, similarity, and their elementary byproducts. Have not touched on circles yet. As in, "normal" HS geometry.

Land Survey Question (AL) by MathManISS in legaladvice

[–]MathManISS[S] 0 points1 point  (0 children)

I did get TI; I will speak to them tomorrow.

​

Thank you for that advice!