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40² + 9²
= 1600 + 81
√1681
41 cm
Rumus mencari limas :
luas alas + luas sisi tegak
(p x l ) + luas sisi tegak
(80 x 24 ) + 4 x 0,5 x 24 x 41
1920 + 1968
3.888 cm²
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