Week 10 – Math 10

13151423_1104682642929345_7203331550546363148_n

This week, I learnt a useful trick I could apply anywhere, from this question. Factoring the formula helped put it in a simpler form I could better understand, and organized it into compact parts. This will save time when punching in numbers on a calculator. It will also make sure I don’t mess up a step, since with the old formula, I simply calculated everything in a messy way:

A = 2\pi r^2 + 2\pi rh

2\pi 5.5^2 + 2\pi 5.5(14.5)

I would normally multiply or take care of exponents, and save the answers in my calculator. Then I would add the two saved numbers together for an accurate answer. However, it can get confusing and I sometimes lose track of what I had already multiplied together. This formula looks much nicer:

2\pi r(r + h)

2\pi (5.5)(5.5 + 14.5)

<<Previous week                                                                                    Next week>>

Print Friendly, PDF & Email

2 thoughts on “Week 10 – Math 10”

Leave a Reply

Your email address will not be published. Required fields are marked *