Jawaban:
126 cm²
Penjelasan dengan langkah-langkah:
K= 2(p+l)
46 cm= 2(p+l)
23 cm= p+l
23 cm= x+3+4x-10
23 cm= 5x-7
30 cm= 5x
x= 6 cm
lebar= x+3= 6+3= 9 cm
panjang= 4x-10= 4(6)-10= 24-10= 14 cm
= 14 cm × 9 cm
= 126 cm²
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Jawaban:
126 cm²
Penjelasan dengan langkah-langkah:
K= 2(p+l)
46 cm= 2(p+l)
23 cm= p+l
23 cm= x+3+4x-10
23 cm= 5x-7
30 cm= 5x
x= 6 cm
lebar= x+3= 6+3= 9 cm
panjang= 4x-10= 4(6)-10= 24-10= 14 cm
= 14 cm × 9 cm
= 126 cm²