Best Answer

Lay the 5cm & 7cm end-to end - which gives you a length of 12cm.Lay the 9cm & 2cm end-to end - which gives you a length of 11cm.

Now - lay both pairs next to each other - making sure one end is flush with it's neighbour. The difference is 1cm. Something like this....

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The vertical bar is just for clarity.

Q: How can you use four rods that measure 2cm 5cm 7 cm and 9 cm to measure a length of 1 cm?

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11cm

A square with a side length of 2cm has an area of 4cm2

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You have to measure how long each side on the shape is.Then you add up all the sides length e.g if you have 4 sides which are 2cm each then you add them together which is 8cm.

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11cm

Put the 7cm and 5 cm rods together = 12 cm Put the 9cm and 2cm rods together = 11 cm Difference between is 1cm thus, you can use that difference to measure 1 cm.

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A cube has all sides of length 2cm. What is the surface area and volume of the cube?

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A square with a side length of 2cm has an area of 4cm2

It is: 4*2*2 = 16 cubic cm

To find the volume, you multiply the length, width/depth, and height together.The answer is 16 cm3.

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