A plumbline (sahul) is the combination of (see figure)
The upper part of plumbline is hemispherical, and the bottom part is conical therefore, it is a combination of hemisphere and cone.
5
A plumbline (sahul) is the combination of (see figure)
The upper part of plumbline is hemispherical, and the bottom part is conical therefore, it is a combination of hemisphere and cone.