Question

Three angle of a heptagon 80 degree, 110 degree and 130 degree if the remaining for equal find the measure of each of the equal angle

Answer 1

total no. of sides of a heptagon =7

total interior angles of a heptagon=180(7-2)

                                                        = 180×5 = 900

           let the equal angle be x

x+x+x+x+80+110+130=900

4x=900-320

x=145