Area of a segment
The area of a segment can be calculated using the following formula
If using degrees:
A = (r2 ÷ 2) x ((Π ÷ 180 x Θ) - sin Θ)
If...
Area of a sector
The area of a sector can be calculated with the following formula:
If calculated in degrees:
A = (Θ ÷ 360) x (Π x r2)
If calculated in radians:
A...
Area of an Ellipse
To calculate the area of an Ellipse, you just need to drop two numbers into the following formula:
A = π x ((w ÷ 2) x (h ÷...
Area of a Rhombus
To calculate the area of a Rhombus, you just need to drop two numbers into the following formula:
A = (w x h) ÷ 2
Where:
A...
Area of a Triangle
How to calculate the area of a triangle
It's very simple to calculate the area of a triangle, you just use the following formula.
A =...
Area of a Trapezium
How to calculate the area of a Trapezium.
It's very simple to calculate the area of a Trapezium, you just need to use the following...
Area of a Parallelogram
How to calculate the area of a Parallelogram.
It's very simple to calculate the area of a Parallelogram, you just need to use the following formula.
A =...
Arc length, how to calculate
You can calculate the length of an arc quite simply, but how you calculate it depends if the angle of the arc is measured...
Circumference of a circle
How to calculate the circumference of a circle.
The circumference of a circle can be calculated using the formula:
2 x π x r
Where π (pi) = approx 3.14
and...
Area of an octagon
How to calculate the area of an octagon
There area two main methods to calculate the area of an octagon.
Method 1:
If you know the length...