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= 22/7 x 14 x 14
= 516 cm^2
L2 = πr^2
= 22/7 x 21 x 21
= 1386 cm^2
L1 + L2 = 516 + 1386 = 1902 cm^2
15. 1/2 x a x t = 1/2 x 8 x 4 = 16 cm^2
p x l = 10 x 16 = 160 cm^2
LP = (16 x 2) + 160 = 32 + 160 = 192 cm^2
maaf kalau salah.