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d2 = 4 x 12,5 = 50
L = 1/2 (12,5 x 50)
L = 25 x 12,5 = 312,5 cm²
15.) V = 1/3 x 18² x 13
V = 1/3 x 324 x 13
V = 108 x 13 = 1404 cm³
semoga membantu (y)
D2= 4×12,5 = 50 cm
Luas= 1/2×d1×d2
= 1/2x12,5x50
=312,5
15. Luas alas = 18×18 = 324 cm^2
Vol Limas= 1/3×324×13
=1404 cm^3