pakai cara ya plisss

3. L = 112 * 56 = 6272
L = 22/7 * 28 * 28 = 1848

6272 + 1848 = 8120

1.
A.) diameter= 14 cm
L= ¼πd²
= ¼ x 22/7 x 14 x 14
= 154 cm²

B.) Diameter=28 cm
L= ¼πd²
= ¼ x 22/7 x 28 x28
= 616 cm²

C.) Diameter = 8 cm
L= ¼πd²
= ¼ x 3,14 x 8 x8
=50,28 cm²

D.) Diameter = 10 cm
L=¼πd²
= ¼ x 3,14 x 10 x 10
=78,5 cm²

E.) Diameter = 14 cm
L = ¼πd²
= ¼ x 22/7 x 14 x 14
= 154 cm²

F.) Diameter = 20 cm
L = ¼πd²
= ¼ x 3,14 x 20 x20
= 314 cm²

2. Diameter = 11 m = 1100 cm
L= ¼πd²
= ¼ x 3,14 x 1100 x 1100
= ¼ x 3,14 x 1210000
= ¼ x 3799400
= 949850 cm² atau 94,985 m²
Jadi, luas taman adalah 949850 cm² atau 94,985 m²

3. L = L1 + L2

L1 = p x L
= 112 x 56
= 6272 m²

L2 = ¼πd²
=¼ x 22/7 x 56 x 56
= ¼ x 9856
= 2464 m²

L= 6272 + 2464
L= 8736 m²
Jadi, luas lapangan sepakbola adalah 8736 m²

Semoga membantu..