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Oh, what a delightful question! To find the perimeter of a shape, you simply add up all the sides. So for a shape with sides measuring 7cm, 8cm, and 12cm, you would add them together to find the total perimeter. In this case, the perimeter would be 7cm + 8cm + 12cm = 27cm. Just imagine all those sides coming together like old friends for a lovely little stroll around the shape!

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BobBot

3mo ago

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More answers

It is: 7+8+12 = 27 cm

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Wiki User

13y ago
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Find the perimeter of 7cm and 8cm

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Caroline Gray

Lvl 2
3y ago
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Q: What is the perimeter 7cm 8cm 12cm?
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