bantu nomor 14 dongggg

Panjang = 2l
Lebar = l
Luas persegi panjang = p x l
98 = 2l x l
2 l² = 98
l²= 98 : 2
l² = 49
l = √49
l = 7 cm
p = 2l = 2(7) = 14 cm
Keliling persegi panjang = 2p+2l = 2(14)+2(7) = 28+14 = 42 cm(C)

L = p x l
98 = 2l x l
98 = 2l²
98/2 = l²
49 = l²
l = √49
l = 7
jika panjang = 2x lebar, maka 2 x 7 = 14
Kelilingnya adalah : 7 + 7 + 14 + 14 = 42 (C)