In geometry, the half circle is referred to as the semicircle. The semicircle is made by dividing a whole circle along its diameter. Alternatively, a semicircle could also be an open arc where a curved line represents half a circle's circumference but with no straight diameter line closing its area.
Know MoreA semicircle's area is always half the area of the original circle that is divided. To measure the area of a semicircle, pi needs to be multiplied to the square of the semicircle's radius before being divided into two. The perimeter of the semicircle is measured by adding the multiplication result of pi with the radius of the semicircle and twice the radius of the semicircle.
Learn MoreA sphere has no faces, edges or vertices. By definition, it is a curved three-dimensional geometric figure whose surface is defined as the set of all the points equidistant from its center point.
Full Answer >A square is a two-dimensional shape that does not have a face, but a square is one of the faces of a cube. Faces are associated with solid figures, such as cylinders, cubes and pyramids. Two-dimensional shapes have breadth and width, but they do not have thickness.
Full Answer >Hexagons are polygons with six sides (or edges) and six angles (or vertices). They are classified as regular or irregular, as well as convex or concave.
Full Answer >Rotational symmetry is a characteristic of any perfect circle. This means that the shape can be rotated less than 360 degrees and still appear exactly the same. A circle is infinitely symmetrical, as it keeps an identical shape regardless of how many degrees it is moved or rotated.
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