Question

Tolong dong besok dikumpulin pe er nya​

Answer 1

K = 2(p+l)

84 = 2(0,5l + l)

84/2 = 0,5l + l

42 = 0,5l + l

42 = 1,5l

42/1,5 = l

l = 28

p = 0,5 × 28 = 14

L = p × l = 14 × 28 = 392 cm²

Answer 2

bismillahirrahmanirrahim

dik.

p =1 1/2 x = 3/2x atau 1,5x

l = x

k= 84cm

langkah langkah

k = 2(p+l)

84 = 2(3/2x + x)

84 = 3x + 2x

84 = 5x

x = 16,8cm

p = 1,5(16,8)

= 25,2 cm

luas = p x l

= 25,2 x 16,8

=423,26cm²