How to determine if triangle is obtuse given sides?

Let the longest side be a and ther 2 sides be b and c.

If the triangle is obtuse then:-

a^2 > b^2 + c^2

It's like discovering the answer to a puzzle. the purpose in solving an equation is to find the value or values of the variable that makes it a true statement. any value of the variable that makes the equation true is called a solution to the equation.