Question

Your friend and your cousin discuss measuring with a ruler. Your friend says that you must always line up objects at the zero on a ruler. Your cousin says it does not matter. Who is correct, and why?
friend; A measurement always starts with a value of zero.


friend; A ruler does not match numbers one to one unless the measurement starts at zero.

cousin; you can choose any number for the start of the object and any number for the end.


cousin; The distance is the absolute value of the difference of the numbers lined up with the beginning and the end of the object.

Answer 1

The correct option is the last one:

"Cousin; The distance is the absolute value of the difference of the numbers lined up with the beginning and the end of the object."

Who is correct, your friend or your cousin?

Now, remember that a rule is equivalent to a number line.

Now, suppose that you are measuring an element with a length of 16 centimeters.

If you measure it by lining up one of the ends of the element with the zero, then the other end will be at the line number 16.

And if you line it up from a different number, let's say 3cm, then the other end of the object (which still measures 16cm) will be at 19cm.

In both cases, to find the measure of the object that you are measuring with the ruler, you need to find the difference between the two numbers on the ruler that line up with the object ends.

If you line up with the zero, you need to subtract zero, so the measure is easier:

16cm - 0cm = 16cm

If you line up with other number, like the 3 in this case, you need to perform the subtraction:

19cm - 3cm = 16cm

In both cases, we will get the same measure. So your cousin is correct, and the correct option is the last one:

Cousin; The distance is the absolute value of the difference of the numbers lined up with the beginning and the end of the object.

If you want to learn more about distances:

brainly.com/question/7243416

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