it a cone cut in half from the top
You simply calculate it like a cone, but the height of the cone is the height to the top of the FILLED part, not all the way. Half-filled is not enough information . . . there can be "half filled" meaning half the height of the cone, but can also be "half filled" meaning half the volume of the cone.
Half of its diameter
pls tell me how to find development for cone which is half cutted
a half circle and a circle
A cylinder, cone or half of a sphere
You simply calculate it like a cone, but the height of the cone is the height to the top of the FILLED part, not all the way. Half-filled is not enough information . . . there can be "half filled" meaning half the height of the cone, but can also be "half filled" meaning half the volume of the cone.
Half of its diameter
nappe :)
It is called a frustum.
I don't think there is a special name for that.
pls tell me how to find development for cone which is half cutted
A cylinder and a cone have infinitely many planes of symmetry because of the circular face. However, a cylinder can also be cut in half lengthwise (imaging cutting a soda can in half), while a cone cannot (imagine cutting a ice cream cone in half). Therefore, a cylinder has one more plane of symmetry than a cone.
It is called a frustrum
two
a half circle and a circle
A cylinder, cone or half of a sphere
Stratovolcanoes are the most prevalent on the planet, totaling about 60 percent of all individual volcanoes. Alternately layered with half lava and half pyroclastic material, they are commonly referred to as composite volcanoes.