What is a 3-D Shape? This is a cube height Depth (Width) length It has 3 dimensions – length, height and depth (width). All 3-D shapes are solids.

Labeling the Parts of a 3-D Shape Vertex (vertices) – the point where three or more faces meet (corner) Edge – a line where two faces meet Face – the flat surface of a 3-D shape A Cube A cube has:6 faces 8 vertices 12 edges

Prisms a special kind of 3D shape has 2 bases and rectangular sides Examples of prisms: Triangular Prism Hexagonal Prism Rectangular Prism

Pyramids a special kind of 3D shape has 1 base and triangular sides Example: Rectangular Pyramid or Square pyramid

The Shapes you need to Know CONE CYLINDER RECTANGULAR PRISM CUBE SPHERE SQUARE-BASED PYRAMID TRIANGULAR PRISM

Rectangular Prism Six faces which are all rectangles. Key Feature Faces6 Vertices8 Edges12

Cube Six faces which are all squares. Key Feature Faces6 Vertices8 Edges12

Triangular Prism A prism with a triangular cross-section. Key Feature Faces5 Vertices6 Edges9

Sphere Every point on the surface of the sphere is the same distance from the centre. Key Feature Faces, Vertices and Edges The normal definitions of faces, vertices and edges are not appropriate for a sphere

Cylinder A prism with a circular cross-section. Key Feature Faces, Vertices and Edges The normal definitions of faces, vertices and edges are not appropriate for a cylinder. HOWEVER, there are 2 bases.

Cone The point of the cone is directly above the centre of the circular base. Key Feature Faces, Vertices and Edges The normal definitions of faces, vertices and edges are not appropriate for a cone. HOWEVER, there is 1 base.

Rectangular (Square-Based) Pyramid A shape with a square base and triangular sides that meet at a point. Key FeatureFaces5 Vertices5 Edges8

Check this out! 1.3D Shapes 1 - this is a game of matching pairs.3D Shapes 1 2.Can you arrange the shapes below in a chain so that each one shares a face (or faces) that are the same shape as the one that follows it? (The faces do not have to be the same size.)

Polyhedron vs. Geometric Solid A polyhedron is in a subclass of geometric solids. The difference is that a polyhedron must have flat faces and straight edges.

Riddle #1 I am a geometric solid. I have six faces. All my faces are squares. What am I?

Riddle #2 I am a geometric solid. I have two surfaces. My base is formed by a circle. I come to a point at the top. What am I?

Riddle #3 I am a polyhedron. I have the fewest number of faces of all the polyhedrons. All of my faces are triangular. I come to a point at the top. What am I?

Riddle #4 I am a polyhedron. I have two triangular bases. My other faces are rectangles. Sometimes I am used for keeping doors open. What am I?

Riddle #5 I am a geometric solid. I have only one surface. My one surface is curved. I have no base. What am I?

Riddle Answers 1. Cube 2. Cone 3. triangular pyramid 4. triangular prism 5. sphere

Websites: gideas.co.uk/maths /contents_shape3d.htm