Tolong song cari keliling nomor 3-5 Dikumpulin besok!

3) L = 42 × 42 = 1764 cm²
L = ½ × 22/7 × 21 × 21 = 693 cm²
Luas gmbr = 1764 - 693 = 1071 cm²

4)L1 = a × t = 8 × 10 = 80 cm²
L2 = ½ × a × t = ½ × 8 × 6 = 24 cm²
L = 80 + 24 = 104 cm²


5)L = 20 × 20 = 400 cm²
L = ½ × 3,14 × 10 × 10 = 157 cm²
L = ½ × 6 × 10 = 30
L gmbr = 400 - (157 + 30)
= 213 cm²