Tolong dikumpul besok ni​

Jawaban:

1. k = 76 cm

p = 24 cm

k = 2 ( p + l )

76 = 2 ( 24 + l )

76 = 48 + 2l

76 – 48 = 2l

28 = 2l

14 = l

lebar = 14 cm

2. l = 90 cm

t = 230 cm

k = 2 ( p + l )

k = 2 ( 90 + 230 )

k = 2 ( 320 )

k = 640 cm

3. s = 45 cm

k = s x 4

k = 45 x 4

k = 180 cm