You are Here: Home >< Maths

Announcements Posted on
Last day to win £100 of Amazon vouchers - don't miss out! Take our quick survey to enter 24-10-2016
1. I don't get why there is a 30degree angle between 12N . Why isn't the angle 45 between the 12N force since it can form a triangle. I don't get why it's worked out that way. This is what I have done , can anyone explain? I can guess that the angle is 30 between 12N as it's an alternate angle ? But I don't get why it is worked out like this ...Thanks.Attachment 544933544935
Attached Images

2. (Original post by coconut64)
I don't get why there is a 30degree angle between 12N . Why isn't the angle 45 between the 12N force since it can form a triangle. I don't get why it's worked out that way. This is what I have done , can anyone explain? I can guess that the angle is 30 between 12N as it's an alternate angle ? But I don't get why it is worked out like this ...Thanks.Attachment 544933544935
Between the 12N force and the horizontal line?

Start with the triangle on the left - interior angle adds up to 180. You have the right angle and the 30 is given, so the other angle is 60. Then you have a 90 degree angle on the horizontal line, plus the 60 from the triangle, and since there are 180 degrees on a horizontal line, you are left with 30 between 12N and the line.

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: June 7, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read here first

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams