Pleasss jawab donggggggggggggggggggggggg

1. L = πr²
π = 22/7
L = 22/7 ×7×7 = 154 cm²

2. L = πr²
π= 3,14
L = 3,14 × 10² = 3.14 × 100 = 314 cm²

3. L = πr²
π= 22/7
L = 22/7 × 28×28 = 2464

4. L = πr²
π= 3,14
L = 3,14 × 36 × 36 = 4069,44