The 3 dimensional version of a circle is a sphere - a round ball. You can make it out of putty or papier mache.
The answer depends on their relative sizes and positions.
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.
No shape has the greatest area. You can make a circle the size of a fingernail, and a square the size of a house; you can make a trapezoid the size of a crumb, and a rectangle the size of a car. Since you can change the size of the shape, there is no true answer.
A circle; a line; or a shape composed of connected lines that do not make a single closed path. Sometimes people say a circle is in fact a polygon with an infinite number of sides. But a closed shape with an infinite number of sides would have to be made of sides with a length of zero; such "sides" are points and not lines. A circle does not therefore meet the definition of a polygon.
it is a net.
Get a 2D model, and add one dimension.
u make your working model of area of circle with your use of brain
of course you can, with a square you can and a circle
Circle and semi-circle?
A model?
The answer depends on their relative sizes and positions.
get clay and shape it to a dragster
paper mache
To make you semi-circle in Adobe Illustrator, you need to use the scissors tool to cut a circle shape perfectly in half.
The planets do not circle the sun in any specific shape. Their orbits around the sun are more elliptical than circular, and each planet has its own unique elliptical orbit.
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.
You can use it to make Pottery or, shape it to make a model.