💯 Maths

How do I find the area of a triangle when I only know the three side lengths?

2 answers
Fowziyah BegumHiiii, I want to get you amazing gcse results17.5k students helped

use the cosine rule b^2 + C^2 -A^2/ 2bc to find the cosA angle. then do cos-1 to find the angle. then use sine rule= 1/2AB sinC to find the area Hope it works

Dr. Badi MExperienced Academic and dedicated tutor for all levels.17.5k students helped

You need to know at least one angle otherwise it is impossible