Apicture frame is made with 40 inches of materail, which expression should i use to frind the area

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

The number of 8th graders who responded to a poll of 6th grade and 8 th graders was one fourtg of the number of 6th graders whi responded if a total of 100 students responddd to the poll how many of the students responded were 6 th graders