If he got 5 points in the first round and he needed at least thirty he would score 9 points in the next three rounds
BD is 31 degrees because it is the same.
ADB is 90-31 because it is a right angle ( 59 degrees)
DEC is 180 - (31*2) because the 180 is of the trangle and the 31 is the same on the other side so times 2 then removed from 180
С = πD
С = 3,14×40
С = 126 in ← <span>to the nearest inch </span>