bantu dong.........
1) B. 172 cm
2) D. 28 cm
Penjelasan dengan langkah-langkah:
5. Diketahui:
p (panjang) = 50 cm
l (lebar) = 16 cm
Jwb: di tanya?...k (keliling)
k = 2 ( p×l )
k = 2 ( 50 + 16 )
k = 2 × 86
k = 172
6. Diketahui:
p (panjang) = 88 cm
l (lebar) = 16 cm
Jwb: di tanya?...p (panjang)
k = 2 ( p×l )
88 = 2 ( p×16 )
88 = 2×16 = 36
88-32 = 56
56:2 = 28
semoga membantu
PENYELESAIAN :
No 1
= 2 x (p + l)
= 2 x (50 + 16)
= 2 x 36
= 172 cm [B]
No 2
K = 2 x (p + l)
88 = 2 x (p + 16)
88 = 32p
p = 88 - 32
p = 56/2
p = 28 cm [D]
_____________________
- Izi!
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