The area is the average of the 2 heights times the base, which is:
(24+16)/2*19.2=384 in^2=D
First you look at the tenths place of each number.
If the number is 0-4 then the ones place stays the same however if the number is 5-9 then the ones place goes up one
So you nearest whole numbers are 76-49
30 degrees is the measure of y.
65.313 will be the answer
