Answer:

1.) 4cm+4cm+4cm+4cm=16cm (16 cm is the perimeter)

2.) 8dm+5dm+5dm=18dm (18 dm is the perimeter)

3.)3mm+7mm=10 mm (10 mm is the permeter

4.) 8dm+12dm+10=30 dm (30 dm is the perimeter)

5.23cm+16 cm=39 cm (39 cm is the perimeter)

In short:

the answer is:

1. 16 cm
2. 18 dm
3. 10 mm
4. 30 dm
5. 39 cm

Step-by-step explanation:

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Answer:

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