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luas persegi = 6 × 6 = 36
luas p. panjang = 12 × 36 = 432
luar keseluruhan 432 + 36 = 468
luas segitiga 6 × 12 /2 = 72/ 2 = 36
yang diarsir = 468 - 36 = 432 (d)
11.
luas ling 1
3.14 × 10 × 10
3.14 × 100
314
karena set lingkaran maka dibagi 2
314 ÷ 2 = 157
luas ling 2
22/7 × 7 × 7
22 × 7
154
karena set. lingkaran
154 ÷ 2 = 77
luas trapesium
(20 + 35) × 14 x 1/2
55 × 14 × 1/2
385
luas total
set ling 1 + set ling 2 + trap
157 + 77 + 385 = 619 (b)
= 36 + 396