Measurements
Area
Circle formula: piR2
Rectangle formula: bh
Parallelogram formula: bh
Triangle formula: 1/2bh
Trapezoid formula: 1/2(a+b)h
Area:
Square:
base x height
Example:
Triangle:
1/2 x base x height
Example:
Circle:
pi x radius squared
Example:
Trapezoid:
1/2 x Height (base1 + base2)
Example:
Pythagorean Theorem
Equation
Square Units
We use square units becuase it is uniform or the same when compared. It is also easier to use than it would be for example a circle.
Circumfrence
The perimeter of a circle is called the circles circumfrence
Formula: 2piR
Surface Area
The extent of a 2-dimensional surface enclosed within a boundary
Right Prisms and Cylinders
Formula: SA=2B+ph
Right Regular Pyramid
Formula: SA=B+1/2ps
Right Circular Cone
Formula: SA=piR2+piRs
Sphere
Formula: S=4piR2
Example:
Volume
Measures the amount of space enclosed within the boundry
Right Prisms and Cylinders
Formula: V=Bh
General Prism or Cylinders
Formula: V=Bh
Pyramids and Cones
V= 1/3Bh