Aiden measures a book with paper strips. it is actually 10 paper strips long, but he gets an answer of 8. what is his mistake ?

Since no options are provided, there could be several reasons for this.

Among these reasons are:

1- He did not measure from the beginning of the first strip till the end of the last one.

Now, check the attached picture please.

For the measurement to be correct, he should measure from the beginning of the first strip till the end of the last one as represented by the red line.

If he measured otherwise, say for example, from the end of the first strip till the beginning of the last as represented by the blue line, he will be getting the wrong measurement.

2- The strips may be of different width. This would lead to an error in measurement.

3- He might have simply miscounted the strips.

4- He did not follow the precision or accuracy rules stated for the measurements using paper strips (if they were stated)

Hope this helps :)

the area of ​​the surface of the rectangular prism here is 250 cm2, which is the surface of the shading

step-by-step explanation: