Lengths of two sides of the triangle and the angle between them are known. Find the length of the third side and the area of the triangle.
We don't know what type of a triangle we're considering here. Therefore the universal and quickest solution to the first problem is use of the cosine rule, which states that for a triangle with sides a,b and c and the angle θ between sides “a” and “b”:c2=a2+b2-2abcos(θ) To find the area of the triangle we should use the formula: A=1/2absin(θ)
SK
Answered by Szymon K. • Further Mathematics tutor
8297 Views
See similar Further Mathematics GCSE tutorsRelated Further Mathematics GCSE answers
All answers ▸Simplify fully the expression ( 7x^2 + 14x ) / ( 2x + 4 )
Prove that tan^2(x)=1/(cos^2(x))-1
A ladder of length 2L and mass m is placed leaning against a wall, making an angle t with the floor. The coefficient of friction between all surfaces is c. At what angle t does the ladder begin to slip?
How can a system of two linear equations be solved?