Why do you have to use estimation to find the number of triangles you need

Question

for the string?

I was wondering why this question is quite confusing and i was wondering if you can explain it to me in a way i can understand it. I'm not looking for an answer just a more simpler view on it.

Answer 1

This doesn't make any sense to me. What have you left out of this problem?

Answer 2

estimation gives you a more reasonable answer than calculating

Answer 3

It gives you more of a rational number of triangles to put on the string, for example it would look odd to put half of triangle on a full triangle pennant flag. All in all estimating makes it easier to understand