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luas sisi tegak = 4 x 1/2 x 13 x 10 = 4 x 65 = 260 cm²
= 12 cm
b = s : 2
= 10 cm : 2
= 5 cm
a² + b² = c²
12² + 5² = c²
144 + 25 = c²
169 = c²
√169 = √c
13 = c
t sisi tegak = c
= 13 cm
L = 4(1/2 × a × t)
= 4(1/2 × 10 × 13)
= 4(65)
= 260 cm²
Jadi jumlah luas seluruh sisi tegak limas adalah 260 cm²