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sudut buku lainnya (PPKn) = 360 - 336 = 24 derajat
persamaan -> 90 derajat = 240 buku
3 derajat = 8 buku
total buku semuanya 360/3 x 8 = 960 buku
buku PPKn = 24 derajat = 24/3 x 8 = 8 x 8 = 64 buku PPKn