an observatory dome is hemispherical in sphae wit a radius of 18 meters and is built  using 12 equal sections.
820928
I am guessing that you want to know how big one of the sections are, so that's what I will try to determine.\n\nThe first step is to find the surface area of the hemisphere with a radius of 18 meters:\nThe surface area of a sphere, with r as the radius, is: A = (4)(π)(r²). Since this is a hemisphere, we can divide the expression equal to the surface area by 2, leaving us: A = (2)(π)(r²).\nA = 2(π)(18²) = 2(π)(324) = 648(π)\n\nSince we know that the surface area of the hemisphere is 648π m², we can divide this by 12 to find out the surface area of one of the sections:\n648π / 12 = 54π meters² ≈ 169.65 meters²
940584
3 meters wide and 90 centimeters high.
601946
As many as there are stars in the sky.
999661
there will be 1 squar meter in a square meter.
442513
The gravitational force holds it into a spherical shape.
680535
every spherical thing has one face ,such as moon,sun,earth,globe,etc
225850
The diameter is 3476 km so it's radius is half that.  That's 1.738 x 10^6 meters.
895487
b- It has a concave primary mirror and flat, diagonal secondary mirror.
359367
The parabolic structure is stronger than a circular strucure or dome.\n\n---Addition---\n\nLet's think in an egg. An egg has two different shapes in each end, one is more rounded like an hemisphere and the other is more like the shape of a paraboloid.\nIf you press the egg from both ends, the egg brakes always \nfrom the more rounded one, the hemisphere looking shape instead of the paraboloid looking end.
325115
It keeps the west close to a very unstable area.
297260
Earth is 12,742 kilometers (7,900 miles) in diameter.
544158
Approximately 12 to 16 inches from the center.
903213
the area is 24in and the perimeter is 20in
183249
2 times the distance from one end to the center.
11029
At 328 meters, the Sky Tower in Auckland, New Zealand is the tallest building in the Southern Hemisphere.
319154
http://home22.inet.tele.dk/hightower/spheres.htm
818769
Well technically it's elliptical, but yes it's a big ol' globe.