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<> 60 cm² = panjang × 5 cm
<> panjang = 12 cm
Diagonal
= √(12² + 5²)
= √169
= 13
Jadi, panjang diagonalnya 13 cm.
p x l = 60
p x 5 = 60
p = 60/5 = 12
diagonal = √12²+5² = √144+25 = √169 = 13 cm