need engineering help or mathmatician

[ZUKEYPR]

Been along time since I've done formulas. I got the surface area of a hexagon with 9 foot sides as 162' sq feet. I have that same hexagon with a depth of 4" requiring 1.98 cubic yards of concrete. Would that be correct?

 

[proskier101]

If you measure perpendicular from 2 sides.. what is the distance?

 

[Fester]

I get 210sf and 2.6 yards.

 

[cruiseroutfit]

A of hex = (((3)(sqrt3))/2)*(length of side)^2

=(((3)(1.7325))/2)*(9^2)

=210.5sqft

210sqft * 1/3ft = 70cuft

27cuft = 1 cu yard ->70cuft = 2.59cuyard

 

[kobyhud]

I come up with 210 sq ft for the surface area of a perfect 9' sided hexagon. 210' * .33' (4") = 69.3 cubic feet or 69.3 / 27 (cubic feet in a cubic yard) or 2.59 cubic yards of concrete.

and someone beat me to the punch

 

[ZUKEYPR]

Thanks folks. Missed the square route on the equation.

 

[Greg]

A of hex = (((3)(sqrt3))/2)*(length of side)^2

=(((3)(1.7325))/2)*(9^2)

=210.5sqft

210sqft * 1/3ft = 70cuft

27cuft = 1 cu yard ->70cuft = 2.59cuyard

Yep, that's what I got too....

:guilty:

 

[bobmed]

I did that formula in my head with the help of the voices that talk to me

 

[MikeGyver]

google "area of a hexagon calculator" recommended search

http://www.math-prof.com/AreaVolume/Hexagon.aspx