Mathematics
Notes & Formula
a) Area
1. Solid Geometry
b) Solid and Volume
a) Area
Square
Width Area = Length x Width
Rectangle use the same formula as square
Length
a
Trapezium
Height
Area = 1/2 x ( a+b ) x Height
b
Triangle
Height
Area = 1/2 x Base x Height
Base
, Circle
r
Area = r2∏
= 22/7 x r2
∏ = 22/7 or 3.14159
Sector
∏
Area = θ / 360 x r2
θ = θ / 360 x ∏x r2
Pi
∏ r2 Mathematical
Square
Radius
Notes & Formula
a) Area
1. Solid Geometry
b) Solid and Volume
a) Area
Square
Width Area = Length x Width
Rectangle use the same formula as square
Length
a
Trapezium
Height
Area = 1/2 x ( a+b ) x Height
b
Triangle
Height
Area = 1/2 x Base x Height
Base
, Circle
r
Area = r2∏
= 22/7 x r2
∏ = 22/7 or 3.14159
Sector
∏
Area = θ / 360 x r2
θ = θ / 360 x ∏x r2
Pi
∏ r2 Mathematical
Square
Radius