# Proof on angles.

1. Dec 23, 2013

### chemistry1

http://postimg.org/image/3mmlbro1p/ [Broken]
Hi, I just want to know if my proof seems ok.

So we can begin with :

we multiply by x to generalize

now, we take x degrees and multiply it by 60 minutes to know how many minutes it makes.We also do the same with x+x/9 grads but we multiply it by a 100 minutes. After, we put this form :

we simplify it :

60x * 9/1000x

We cancel and simplify

3*9/50

Which finally gives us 27/50 for any 'x'.

Does this seem correct ? Thank you !

Last edited by a moderator: May 6, 2017
2. Dec 23, 2013

### scurty

That seems to work. You can simplify the process by a few steps by doing

$\displaystyle\frac{60(x-\frac{x}{10})}{100(x)}$ instead.

3. Dec 23, 2013

### Staff: Mentor

It's a bad idea to use mixed numbers like 1 + 1/9, because it makes the calculations more difficult.

Last edited by a moderator: May 6, 2017
4. Dec 23, 2013

### chemistry1

Ok, thanks for the info !