Penjelasan dengan langkah-langkah:
a) Panjang persegi panjang
p² = d²-l²
p² = 25²-15²
p² = 625²-225²
p² = 400
p = √400
p = 20 cm
b) Keliling persegi panjang
= 2(p+l)
= 2(20+15)
= 2(35)
= 70 cm
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Penjelasan dengan langkah-langkah:
a) Panjang persegi panjang
p² = d²-l²
p² = 25²-15²
p² = 625²-225²
p² = 400
p = √400
p = 20 cm
b) Keliling persegi panjang
= 2(p+l)
= 2(20+15)
= 2(35)
= 70 cm