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alexandr1967 [171]
3 years ago
8

Please help me with 1-8

Mathematics
1 answer:
lidiya [134]3 years ago
8 0

Answer:

Will no explain too much in details.

The bottom rectangle has sizes 21cm*9cm, so its area is 189cm^2.

The remaining rectangle has sizes 6cm*7cm(16-9=7cm),so its area is 42cm^2.

The area of the object is 231 cm^2.

The perimeter is 21+9+16+6+(16-9)+(21-6) = 74 cm.

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