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44 X 15 / 2
660 / 2
330
L = 1/2 x (13 + 31) x 15 = 1/2 x 44 x 15 = 22 x 15 = 330
no 25
L diarsir = L segi3 - L 2 x 1/2 lingakaran = L segi3 - L lingkaran
L segi3 = 1/2 x a x t = 1/2 x 24 x 36 = 12 x 36 = 432
L lingkaran = 1/4 x 3,14 x 10 x 10 = 1/4 x 314 = 78,5
L diarsir = 432 - 78,5 = 353,5