Help your students prepare for their Maths GCSE with this free area of a triangle using sine worksheet of 30 questions and answers
The formula Area = (1/2)absin(C) can be used to find the area of any triangle. This is useful when we don’t know the length of the base or the height of the triangle. When using this formula, the sides of the triangle are labelled a, b and c and the angle opposite side c is labelled C.
The formula can be used to find the area of equilateral triangles, isosceles triangles and scalene triangles. We usually would not use it to find the area of a right triangle since we can easily identify the height and base of the triangle when there is a right angle.
To find the area of the triangle, we substitute the side lengths a and b and the angle C into the formula and perform the calculation. It is likely that the answer will be a decimal so be sure to check how many decimal places or significant figures are required for the answer.
Looking forward, students can then progress to additional geometry worksheets, for example, a 3D shapes worksheet or an area of a triangle worksheet.
For more teaching and learning support on Geometry our GCSE maths lessons provide step by step support for all GCSE maths concepts.
There will be students in your class who require individual attention to help them succeed in their maths GCSEs. In a class of 30, it’s not always easy to provide.
Help your students feel confident with exam-style questions and the strategies they’ll need to answer them correctly with our dedicated GCSE maths revision programme.
Lessons are selected to provide support where each student needs it most, and specially-trained GCSE maths tutors adapt the pitch and pace of each lesson. This ensures a personalised revision programme that raises grades and boosts confidence.