what is the formula to find angle A? please help

What Is The Formula To Find Angle A Please Help class=

Answer :

Answer:

Step-by-step explanation:

The formula for finding the total measure of all interior angles in a polygon is: (n – 2) x 180. In this case, n is the number of sides the polygon has. Some common polygon total angle measures are as follows: The angles in a triangle (a 3-sided polygon) total 180 degrees.