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shutvik [7]
2 years ago
9

The perimeter of an equilateral triangle is p and the length of a side is s.

Mathematics
1 answer:
kompoz [17]2 years ago
8 0

Answer:

s=7

p=3s

Step-by-step explanation:

The perimeter is the side length times 3

So the equation would be p=3s

Plug in 21 for p

21=3s

That means s=7

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