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# Mathematics

All mathematical subjects

### 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...