6. - - What is the sum of the measures of the interior angles of a convex polygon with n sides? A (n-2)90 C. (n-2)180 B. (n-2)120 D. (n-2)360 It is the sum of the measures of the interior angles of a heptagon. A 720° C. 1,080° B. 900° D. 1,260° 7​

6 What is the sum of the measures of the interior angles of a convex polygon with n sides A n290 C n2180 B n2120 D n2360 It is the sum of the measures of the in class=