a radar uses a "parabolic" dish to capture the radio waves and because the shape is concave the waves hit the centre of the dish, the receiver is placed away from the centres facing the dish where the waves are reflected to it. The classic example is satellite dish receivers
None, but we have a couple square-shaped.
There are various reasons that manholes are shaped like a circle. For example, it is much easier to dig a circular hole.
the earth is a sphere but if you look at it as a 2d shape it is a circle
A circle perhaps
Cone shaped
A wedge shaped portion of a circle is called a sector.
A circle has to be ring shaped (starting and finishing at the same point) otherwise it isn't a circle.
Did you know that the sun is circle shaped?
None, but we have a couple square-shaped.
"Circular", meaning shaped like a circle.
There are various reasons that manholes are shaped like a circle. For example, it is much easier to dig a circular hole.
a "Flat circle thing that's flat" ;)
sliver
sector
it was a circle
the earth is a sphere but if you look at it as a 2d shape it is a circle
Its a bit of oval and circle