Question

Formulas of triangle....​

Answer 1

Answer:

THE THREE SIDES AND THREE ANGLES OF A TRIANGLE TAKEN TOGETHER ARE CALLED THE SIX PARTS OR ELEMENTS OF THE TRIANGLE.

Step-by-step explanation:

Thus, perimeter of triangle ABC=AB+BC+CA

Answer 2

The law of cosines generalizes the Pythagorean formula to all triangles. It says that c2, the square of one side of thetriangle, is equal to a2 + b2, the sum of the squares of the the other two sides, minus 2ab cos C, twice their product times the cosine of the opposite angle.