Dear World ,

** Cube** Any day, 2012

I know a lot about 3-D solids! A cube is like a square but it pops out. A cube is the same shape as a sugar cube. Cube is even in the name of a sugar cube! 🙂 A cube has eight vertices. It also has twelve sides. A cube also has six faces.

** Cone**

(If you hold the point of the cone it looks like an ice cream cone.Also if you grab a sphere and put it on top it is like a real ice cream cone! 🙂 ) A cone has two faces. One is on the bottom and one is curved all the way around. There is one vertex on the cone. It is the point at the top. The cone has one side it is around the circle the one out side of the circle at the bottom.

**Rectangular prism**

A rectangular prism is like a cube but it is longer and if you turn it the other way it is taller. If you turn it the tall way it could be the same 3-D solid as a lamp. A rectangular prism has eight vertices. It also has has twelve sides. It also has six faces. (If you look around you can find them every ware!) 3-D solids are really fun! You can find 3-D solids everywhere!!

Sphere

A sphere is like a ball. It can roll. It has one face. The face is all around. It has no vertices. Does a sphere have a side? If a sphere has a side where is it? Is it all the way around? Some ideas a sphere can be any kind of ball or round things, Some heads,some basket balls,base balls, and more. Spheres are everywhere!!!

**Cylinder**

A cylinder has three faces,one on the top one on the bottom and the last one is the one all the way around. The cylinder has two sides one on the top around the circle and one around the circle on the bottom. If you turn the cylinder to the roll part is can also roll but it is not like a sphere. What is your favorite 3-D solid?

**Pyramid**

A pyramid has eight sides. It also has five faces. The pyramid has five faces. If you go to a desert place you might find a real pyramid! Sometimes you go to a desert place for vacation.Do you know what the Egyptians used an inclined plane to build a pyramid? They used a inclined plane because if they lifted the blocks they would get aches and cramps.

**Hemisphere**

A hemisphere is like a sphere but half. It can also be half of a ball and half of a head. Even if it looks like a sphere (half of a sphere) it can not roll as long as a sphere can. Did you know that any way you turn the hemisphere the curved part will always be across from the flat part? The hemisphere has one side the side is the one around the circle on the bottom. A hemisphere has two sides the one circle on the bottom and the one on top all curved around.

**Pentagonal pyramid**

A pentagonal pyramid has six vertices. It also has ten sides. How many faces does it have? Well lets figure it out. It has seven faces. It’s like a cone but this time it is more like a pyramid and it is pointed. Be carful with the pointy side, don’t hit your eye with the point at the top. That is why you need to be careful. If you turn the pentagonal pyramid to the bottom the right way it looks like a hexagon. I know it looks like a hexagon because it has five vertices on the bottom with the hexagon.

**Pentagonal prism**

A pentagonal prism has ten vertices. You don’t have to count that much because on each side it has five and as you know 5+5=10. A pentagonal prism has 15 sides. Did you know that pentagonal prisms are seen in a lot of places. Did you know that if you get a pencil that is not sharpened and does not have the piece that makes the eraser and the pencil go together and without the eraser it is a pentagonal prism. That is why you see pentagonal prisms in a lot of places.

See I told you I knew a lot about 3-D solids!!!!!! Do you know as much about 3-D solids as I know??

Do you know about 3-D solids???

From,

Avery