Using trigonometry to find the area of any triangle no prep lesson. Power point with proof of formula and 3 examples. Each example has one for teacher to do and then one for students to try, Worksheet ...

Looking for more revision? There are videos, diagrams and more on calculating the area of a triangle using trigonometry in this National 5 Maths guide. National 5 Maths - Calculating the area of a ...

This is a whole lesson looking at using the Trig Area Rule (1/2absinC) to find the area of a triangle in various contexts. It comes with an excellent worksheet that has different problems including ...

Being able to identify which formula to use, sine or cosine, and when, is necessary to answer questions on this topic successfully. Check you are confident in how to use the sine and cosine rules.