Di tolong yaa hari ini di kumpul (:

1. )
luas = (50 × 23) + (20 × 20)
luas = 1150 + 400
luas = 1550

keliling = 50 + 23 + 14 + 20 + 20 + 20 + 16 + 23 = 176

2.)
luas = (8 × 5) + (2 × 2) + (4 × 5)
luas = 40 + 4 + 20
luas = 64

keliling = 8 + 3 + 3 + 2 + 7 + 4 + 10 = 37

3.)
luas = (42 × 10) + (40 × 28)
luas = 420 + 960
luas = 1380

keliling = 42 + 10 +23 + 28 + 40 + 28 + 21 + 10 = 202

4.)
luas = (15 × 10)+(10 × 5)
luas = 150 + 50
luas = 200

keliling = 15 + 10 + 25 + 5 + 5 = 60