The round manhole cannot fall into the hole no matter which way you turn it.
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round
bh=a or s2=a multiply two sides square one side round ex one side=3.128 3.128X3.128=9.784384 3.1282= 9.784384 round that to 9.8
-- You have to ask somebody for the radius of the sphere, in meters. If they tell you the diameter instead, then the radius is 1/2 of the diameter, in meters. -- Multiply (4) times (pi) times (the radius)2 . That's the surface area of the sphere, in square meters. -- Round the answer to the nearest square meter.
21.27"
Flatten it out then measure it with a ruler! ;)