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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
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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.

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