It is exactly like when the moon looks like when it is half full.
The diameter is the distance across the circle. So if you split the circle in half by drawing a line through it, the diameter would be the length of that line.
s diameter of the circle in the drawing above is the segment
Bresham's Mid point circle drawing algorithm.
circle(radius)
another name for a half circle is semi-circle
Coca cola
To draw a hemisphere, start by drawing a circle. Then, draw a curved line cutting the circle in half vertically. This line represents the hemisphere's cut surface. Finally, shade one half of the circle to show the curved surface of the hemisphere.
a hemisphere
Half a circle is called a semi-circle. Sometimes it is called a half-moon.
John Stith Pemberton
a half circle? a half? semi circle? half sphere?
Half a circle is called a "semicircle" in geometry.