42 cm is equal to 0.42 meters. This conversion is based on the fact that there are 100 centimeters in one meter. Therefore, to convert centimeters to meters, you divide the number of centimeters by 100.
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In an equilateral triangle, all sides are of equal length. So sum of three equal sides is 42 cm. Therefore, each side is 42/3 = 14 cm.
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Use Pythagoras' theorem: 42+42 = 32 and the square root of this is the length of the hypotenuse
If you have tape that is 1.4 cm longs and the length of 29.4 would equal to 21 cm. This is a simple math problem.
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