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304 = 1/2 D1 x 16
304 = D1 x 8
38 = D1
9. L Lingkaran = rxr
78,5 = 3, 14 x r x r
25 = r²
5 = r
berarti diameternya 2 x r = 2 x 5 = 10
10. L Segitiga = A x T 1/2
201,5 = A x 31 1/2
403 = A x 31
13 = A
horeeee