yes, they are lick the same and look the same they are lick dots but they are circle to so do not foget just read here or on a nother website
no
a filled in circle/dot means "greater than or eaqual to/less than or equal to" (depending on which way the arrow is pointing. an empty cirlce means only "greater than/less than". the greater than/less than symbol with the line under it will indicate the filled in circle. the normal greater than/less than symbol willl indicate the hollow cirlce
cirlce
Assuming that cirlce = circle and raduis = radius, the answer is 452 sq metres.
it is a sphere not a cirlce.
360
it is a cirlce with a cross
25pi
It is a 3-D cirlce
a cirlce
9pi
(/) a cirlce with a line through it