What are all the triangle formulas?

Answer 1

Area = (Base x Height) / 2

For a right angle triangle Pythagoreas' Theorem states: a2 + b2 = c2

sum of angles = 180o

For a non-right angle triangle: {

the Sine Law states:

a/Sin(A) = b/Sin(B) = c/Sin(C)

for ease of explanation let abc be lengths of a non-right angle triangle.

{a / Sin(angle where b meets c)} = {b / Sin(angle where c meets a)} = {c / Sin(angle where a meets b)}

The Cosine Law states:

(with respect to the above example)

a2 = b2 + c2 - 2bc Cos(A)

b2 = a2 + c2 - 2ac Cos(B)

c2 = a2 + b2 - 2ab Cos(C)

}