Question

I mainly need #2 but if you know any of them please let me know

Answer 1

1) 88 cm²

2) 34.137 cm²

3) 11.57 cm²

4) 195.938 cm²

Explanation:

1) 6x12=72

4x4=16

72+16=88

2) 1/2x2x4x5=20

1/2π3²=14.137

20+14.137=34.137

3) 5x2=10

1/2π1²=1.57

10+1.57=11.57

4) 3x14=42

π7²=153.938

42+153.938=195.938