Answer:
A.
1. 20cm 5+5+5+5=20
2.32 cm 7+7+9+9=32
3.40 cm 11+11+9+9 = 40
b.
4. 49cm² 7x7= 49
5. 24cm² 6x4 = 24
6. 31.5 cm² 9 x 7 = 63/2 = 31.5
7. 380.13 cm² 3.14 x11² = 380.13
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Answers & Comments
Answer:
A.
1. 20cm 5+5+5+5=20
2.32 cm 7+7+9+9=32
3.40 cm 11+11+9+9 = 40
b.
4. 49cm² 7x7= 49
5. 24cm² 6x4 = 24
6. 31.5 cm² 9 x 7 = 63/2 = 31.5
7. 380.13 cm² 3.14 x11² = 380.13