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2 years ago

This 3 by 3 grid shows nine 1 cm x 1cm squares and uses 24 cm of wire.

Mathematics

1 answer:

stealth61 [152]2 years ago

8 0

Answer:

E 840 cm

Step-by-step explanation:

For a 20×20 grid, there will be 21 strands in the vertical direction, and 21 in the horizontal direction. Each strand wil be 20 cm long. The total length is ...

(20 cm)(2 × 21) = 840 cm

_____

<em>Additional comment</em>

In this case, we take "similar" to mean that the grid squares are 1 cm, and the wire encloses a larger array of those squares.

In geometry, the term "similar" would mean the larger grid is simply a scaled-up version of the smaller one, with squares that are 20/3 cm, instead of 1 cm. The length of wire required in that case is (4+4)(20 cm) = 160 cm = (20/3)×(24 cm).

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3 0

3 years ago

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algol [13]

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