volume and surface area Mathematics Gr. 7

Prism

•Flat surface

•Parallel lines

•Same across sections

•NO CURVES

Regular Prisms

•Triangle

•Square

•Rectangular

•Penatgonal

Irregular Prism

•Different from regular prisms

•Irregular Pentagon

Formulas:

•Area = Area x Length

•Ex: A triangle has an area of 20 sq. cm and 10 cm long.

•20 sq.cm x 10 cm = 200 cubic cm

Cubiod

•Box shape

•Rectangular prism

•Right angle

Square prism

•2 sides are equal

•Appearance of a square

Cube (Hexahedron)

•3 sides are equal

•Has a face of a square

•Note: The name "cuboid" comes from "cube" and -oid (which means "similar to, or resembling") and so says "it is like a cube".

•Another use of -oid is when we talk about the Earth being a spheroid (not exactly a sphere, but close).

•

Formulas

Volume = L(W) (H)

Surface Area = 2(L)W) + 2 (W)H + 2 (L)H

References:

• www.google.com

• http://www.mathsisfun.com/geometry/cuboids-rectangular-prisms.html

• http://www.mathsisfun.com/geometry/prisms.html