Glossary
Area is the number of square units it takes to cover a flat surface. Units are written as mm2 (square millimetres), m2 (square metres), in2 (square inches), or ft2 (square feet).
Area of a rectangle or parallelogram is A = l x b
Area
of a square is A = s 2
Area
of a triangle is 
Area
of a circle is 
(In
engineering you tend to work with diameter (d), but sometimes you may
have to use the radius (r)
of a circle in which case the formula for area
is A= 
r2)
Surface
area of a
cube is A = 6s2
Surface area of
a sphere is A = 4 r2 or
A = d 2
Complete
this area activity sheet (Word 544 kb)
