Question

Tolong kerjaķan yang nomer 5 pakai cara yaa...trima kasih

Answer 1

K = 2(p + l)

30 = 2(p + l)

p + l = 30/2

p + l = 15

substitusikan nilai p = l + 1

l + 1 + l = 15

2l + 1 = 15

2l = 15 - 1

2l = 14

l = 14/2

l = 7

substitusikan l = 7 ke persamaan

p + l = 15

p + 7 = 15

p = 15 - 7

p = 8

Luas persegi panjang :

L = p x l

L = 8 x 7

L = 56

Jawabannya : c. 56 cm²

Semangat belajar.. ^_^