CBs as in CB radios used by drivers of Semi trailers
Heron's formula
Yes.
circles, squares, rectangles mainly... but the odd semi circles etc...
Semi-circles are typically used to denote a warm front on a weather map. These semi-circles point in the direction of movement of the front and indicate the side on which warmer air is replacing cooler air.
Half a sphere, which is a 3D shape, is called a hemisphere. The semi-circles in the question is a 2D shape and will make a circle.
Truck drivers like semi-circles!! haha:)
if youre talking about a semi circle or a hemisphere, theyre both half circles.
Answer to part 1 = Oblong (ellipsoidal rectangle) Answer to part 2 - possibly egg-shaped? Probably still oblong though.
cylinder
Semi circles cannot tessellate on their own because they do not have a consistent straight edge to fit together seamlessly without gaps or overlaps. In order to tessellate, a shape must be able to fill a plane without any overlaps or gaps. However, semi circles can be combined with other shapes to create a tessellation, such as alternating semi circles with squares or triangles.
The 2 halves in a circle are the 2 semi circles.
Geometry teaches there are an infinite number of semi-circles for a sphere. Hence in the grid system that creates the longitude lines that form semi-circles, it becomes the same as what is taught in geometry = infinite number. If you limit yourself to using a llimited definition to units of whole degrees, then 360 semi-circles. However, I suspect that the answer you need is Infinite.