Jawab:
336 [tex]cm^{2}[/tex]
Penjelasan dengan langkah-langkah:
Keliling persegi panjang yaitu 80 cmKeliling = 2 (p + l) = 80 cm= p + l = 80/2
= p + l = 40 cm
panjang : lebar = 7 : 3
p : l = 7 : 3
p = 7/10
l = 3/10
p = 40 x 7/10 = 28 cm
l = 40 x 3/10 = 12 cm
Luas persegi panjang = p x l
p = 28 cm
l = 12 cm
p x l = 28 x 12 = 336 [tex]cm^{2}[/tex]
Jawaban:
336 cm²
Keliling persegi panjang :
= 2( p + l )
= 2( 7x + 3x )
= 2( 10x )
= 20x
[tex] \rm = \frac{80}{20} [/tex]
= 4
____________________
P = 7 × 4 → 28
L = 3 × 4 → 12
[tex] \\ [/tex]
Luas persegi panjang :
= p × l
= 28 × 12
= 336 cm²
#BelajarBersamaBrainly
#Koreksi -^-
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Jawab:
336 [tex]cm^{2}[/tex]
Penjelasan dengan langkah-langkah:
Keliling persegi panjang yaitu 80 cm
Keliling = 2 (p + l) = 80 cm
= p + l = 80/2
= p + l = 40 cm
panjang : lebar = 7 : 3
p : l = 7 : 3
p = 7/10
l = 3/10
p = 40 x 7/10 = 28 cm
l = 40 x 3/10 = 12 cm
Luas persegi panjang = p x l
p = 28 cm
l = 12 cm
p x l = 28 x 12 = 336 [tex]cm^{2}[/tex]
Jawaban:
336 cm²
Penjelasan dengan langkah-langkah:
Penyelesaian :
Keliling persegi panjang :
= 2( p + l )
= 2( 7x + 3x )
= 2( 10x )
= 20x
[tex] \rm = \frac{80}{20} [/tex]
= 4
____________________
P = 7 × 4 → 28
L = 3 × 4 → 12
[tex] \\ [/tex]
Luas persegi panjang :
= p × l
= 28 × 12
= 336 cm²
#BelajarBersamaBrainly
#Koreksi -^-