# Three-Dimensional Shapes

## Presentation on theme: "Three-Dimensional Shapes"— Presentation transcript:

Three-Dimensional Shapes
Geometry Three-Dimensional Shapes

Three-dimensional Shapes (3D)
These shapes are solid or hollow. They have three dimensions – length, width and height.

Face Part of a shape that is flat.(Or curved) E.g. A cube has 6
of these.

Edge The line where two faces meet. E.g. A cube has 12 of these.

Vertex (Vertices) The place where three or more edges meet.
This pyramid has 4 of these.

Cube A three- dimensional shape which has 6 square faces all the same size. Some faces parallel Some edges parallel Some faces perpendicular Some edges perpendicular

Face of a cube

2 3 1 5 6 4

Rectangular Prism A three- dimensional shape which has 6 rectangular faces. Some faces parallel Some edges parallel Some faces perpendicular Some edges perpendicular

Faces of a rectangular prism

3 1 2 2 4 1

Cone A three dimensional shape with a circle at its base and a pointed vertex. No parallel faces or edges No perpendicular faces or edges

Face of a cone

1

Cylinder A three- dimensional shape with circular ends of equal size.
Some faces parallel Some edges parallel Some faces perpendicular No edges perpendicular

Face of a cylinder

1 1 2

Pyramid A three-dimensional shape which has a polygon for its base and triangular faces which meet at one vertex. E.g. Triangular pyramid Square pyramid Hexagonal pyramid Pentagonal pyramid

Face of a pyramid

Square base pyramid No faces parallel Some edges parallel
No faces perpendicular Some edges perpendicular

1 2 1 4 3

Sphere A perfectly round three-dimensional shape, like a ball. It has only one curved face. No parallel faces or edges No perpendicular faces or edges

Real World Representations
1. What solid shape does it represent? 2. How many faces does it have? 3. How many edges does it have? 4. How many vertices does it have? A cube 6 faces 12 edges 8 vertices

Real World Representations
1. What solid shape does it represent? 2. How many faces does it have? 3. How many edges does it have? 4. How many vertices does it have? A sphere 0 faces 0 edges 0 vertices

Real World Representations
1. What solid shape does it represent? 2. How many faces does it have? 3. How many edges does it have? 4. How many vertices does it have? A square pyramid 5 faces 8 edges 5 vertices

Real World Representations
1. What solid shape does it represent? 2. How many faces does it have? 3. How many edges does it have? 4. How many vertices does it have? A cylinder 2 faces 0 edges 0 vertices

Real World Representations
1. What solid shape does it represent? 2. How many faces does it have? 3. How many edges does it have? 4. How many vertices does it have? A rectangular prism 6 faces 12 edges 8 vertices

Real World Representations
1. What solid shape does it represent? 2. How many faces does it have? 3. How many edges does it have? 4. How many vertices does it have? A cone 1 faces 0 edges 1 vertex

Real World Representations

Creating 3- Dimensional Shapes
Cut out the shape along the outer edge. Fold all the edges of the shape first. Use a small amount of glue on the shaded areas. Carefully fold and press the shaded areas to the back of the faces.