kak tolong dong besok dikumpulin pakai cara ya nomor 8 sama nomor 10

Bangun Datar
SD Kelas IV

8]
Luas bangun = Luas Persegi Panjang - Luas Segitiga
                      = (p x l) - (1/2 x a x t)
                      = (20 x 8) - (1/2 x (8 - 2) x (20 - 12))
                      = 160 - (1/2 x 6 x 8)
                      = 160 - 24
                      = 136 m²

10]
K = 120 cm
p = 36 cm

K = 2(p + l)
120 = 2(36 + l)
120 / 2 = 36 + l
60 = 36 + l
l = 60 - 36
l = 24 cm

Luas = p x l
         = 36 cm x 24 cm
         = 864 cm²