Answer:
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
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