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Forum topic by dakotanut  posted 09192018 08:33 PM  768 views  0 times favorited  9 replies 
09192018 08:33 PM 
Topic tags/keywords: question I am trying to design a home plate shelf for my autographed baseballs. I’ve got most of my measurements down but not the diamond part at the bottom. Having trouble with the length of the sides and angle. Is there a way to calculate this or figure it out? Thanks. 
9 replies so far
#1 posted 09192018 11:04 PM 
The blue squares in the corners and at the point are 90° angles.  "You know, I'm such a great driver, it's incomprehensible that they took my license away." Vince Ricardo 
#2 posted 09202018 01:29 AM 
easy peasy. a little but of trig tells us that it is actually 44.9005279606889 and then come to think of it you could make it a 45 by turning your 12 legs into 12.0208152801713 
#3 posted 09202018 05:59 AM 
Don’t use math, you’ll really screw it up because home plate dimensions as spelled out by the rule book are mathematically impossible. Plus you don’t need math. This is one of the few times where I think something from a rule book as big as the MLB rule book is easy to comprehend: It shall be a 17inch square with two of the corners removed so that one edge is 17 inches long, two adjacent sides are 8½ inches and the remaining two sides are 12 inches and set at an angle to make a point. Just use those numbers like Rippers diagram and make a template. 
#4 posted 09202018 09:07 AM 
Thanks. I was actually going to make it a little bigger than this. I’ll get back to you this evening with actual dimensions. 
#5 posted 09202018 12:11 PM 
All you need to remember is that the sum of a polygon’s angles is 540°. So, if you know that home plate has the three 90° angles and the other angles are equal you can calculate that the other angles must be 135° each. Like so: 90° + 90° + 90° = 270° 540° – 270° = 270° 270° ÷ 2 = 135°  "You know, I'm such a great driver, it's incomprehensible that they took my license away." Vince Ricardo 
#6 posted 09202018 12:44 PM 
Ok. Thank you 
#7 posted 09202018 01:00 PM 

#8 posted 09202018 01:26 PM 
Outstanding. 
#9 posted 05022019 03:44 PM 
Here is how I did mine: 
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