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t = √10²+24² = 26
Luas permukaan limas = Luas alas + 4 x luas segitiga
= 20 x 20 + 4 x (20 x 26)/2
= 400 + 1040
= 1440 cm²
optionnya salah kali
t = √24² +√10²
t = √676
t = 26
lp = luas persegi + 4.luas segitiga
= 20.20 + 4 .20 . 26
2
= 400 + 1040
= 1440
semoga membantu :)