How can a number line help you measure objects?

Hint: A number line is a line marked with numbers with unit distance apart. It can be used to measure the length of the objects by subtracting the final coordinate of the object’s position as seen on the number line with the initial coordinate of the object’s position.

Complete step by step solution:
According to the question, we have been asked to show or demonstrate as to how a number line can help us in measuring the objects.
A number line is a line which stretches indefinitely and is numbered which are unit distance apart. On the left side of the number line are the negative numbers and on the right side of the number line we have the positive numbers. The positive numbers and the negative numbers are separated by the number 0.
We can use this number line to determine the length of a line segment or even the length of the side of a square or a rectangle.
Suppose, we have a line segment AB whose length we have to find. We will simply place the line segment over the number line. We will then subtract the coordinates of the rear and the front position of each line segment.
That is,

So, the length of the line segment AB = coordinate of B – coordinate of A
\[=5-1\]
\[=4units\]
Therefore, we can use a number line for measuring objects.

Note: Using the number line has its limitation as well. As it cannot be used for measuring the objects in real life. In order to measure them, we will require to lower the object to either 1 dimension or 2 -dimension picture, which is not practically always possible.