Cosine Rule and Area of Triangle

Examples, solutions, videos, games, activities and worksheets that are suitable for GCSE Maths.
How to find the area of a triangle given 3 sides using the cosine and sine rule?

Cosine Rule and Area of any triangle
GCSE Maths revision Exam paper practice
Cosine rule, Pythagoras' theorem, area of triangle = 1/2ab Sin C

Trigonometry in any triangle (cosine rule)
GCSE Maths revision Exam paper practice & help

GCSE Maths Revision: Exam paper practice Cosine rule and area of any triangle

Cosine Rule: finding the area of a triangle given 3 sides

Try out our new and fun Fraction Concoction Game.

Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.

We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.