2d And 3d Shapes 471a34

2 Dimensional (2D) & 3 Dimensional (3D) Shapes

2 Dimensional Shapes (2D) Two-dimensional shapes that have sides made from straight lines. They have two dimensions – length and width. Example : triangles

squares hexagons

Square Two dimensional shape with 4 sides of the same length and four 90° angles.

Rectangle A four sided twodimensional shape with two pairs of parallel sides that meet at right angles.

Pentagon A two-dimensional shape with five straight sides and five angles.

Hexagon A two-dimensional shape with 6 straight sides and 6 angles.

Heptagon A two-dimensional shape with 7 straight sides and 7 angles.

Octagon A two-dimensional shape with 8 straight sides and 8 angles.

Circle A round flat twodimensional shape.

Triangle Two-dimensional shape with three straight sides and three angles.

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

Surface Part of a shape that is flat or curved. E.g. A cube has 6 surfaces.

Edge The line where two surfaces meet. E.g. A cube has 12 edges.

Vertex (Vertices) The place where three or more edges meet. This cube has 8 vertices.

Cube Surface : 6 surfaces

Edge : 12 edges Vertex : 8 vertices

Cuboid Surface : 6 surfaces Edge : 12 edges Vertex : 8 vertices

Sphere Surface : 1 (curved surface) Edge : 0 edge Vertex : 0 vertex

Cone Surface : 2 (1 curved surface & 1 flat surface) Edge : 1 edge Vertex : 1 vertex

Cylinder Surface : 3 (2 flat surfaces & 1 curved surface) Edge : 2 edges Vertex : 0 vertex

Pyramid Surface : 5 surfaces

Edge : 8 edges Vertex : 5 vertices

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