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# Geometry homework help watch

1. Attachment 618434 Can someone please check if my answers to these questions are right? I think question 9 may be wrong as it's a polygon, and exterior and interior angles of a polygon add up to 180 altogether. Can someone give me any tips to tackle these questions as well? Many thanks. ( these are the questions. Next to the questions are the second part of the answers and the first part of the answer are underneath)
Attached Images

2. Hello I am in 2 minds about question 9 in the first exercise. Is o 40 and p 53?
3. (Original post by Zonyali123)
Can someone please check if my answers to these questions are right? I think question 9 may be wrong as it's a polygon, and exterior and interior angles of a polygon add up to 180 altogether. Can someone give me any tips to tackle these questions as well? Many thanks. ( these are the questions. Next to the questions are the second part of the answers and the first part of the answer are underneath)
After a quick read through, Q8 and Q9 need corrections - possibly a misinterpretation of 'angles on a straight line'.

I'll help later when I have time if someone else hasn't.
4. (Original post by notnek)
After a quick read through, Q8 and Q9 need corrections - possibly a misinterpretation of 'angles on a straight line'.

I'll help later when I have time if someone else hasn't.
Ok thanks I really appreciate it.
5. Are all the angles in question 8 118, because I have just looked again and realized that it's not a straight line and l and m are also alternate angles ( I think).
6. (Original post by Zonyali123)
Are all the angles in question 8 118, because I have just looked again and realized that it's not a straight line and l and m are also alternate angles ( I think).
'm' is not 118. Your original answer correct but you used 'angles on a straight line'. This can only be used when the angles are next to (touching) each other.

You can use co-interior angles instead to get 'm'. Can you see how?

For 9), notice that you haven't used the 133 angle anywhere in your working. Have another go using this angle in your working and post your working if you get stuck.
7. Yes I get what you mean about question 8. Co- interior angles do add up to 180 so yes that can be used. Can you please check some more questions for me? Here they are Attachment 618472618474
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8. (Original post by Zonyali123)
Yes I get what you mean about question 8. Co- interior angles do add up to 180 so yes that can be used. Can you please check some more questions for me? Here they are Attachment 618472618474
9. Hello I have tried working out question 9, but I don't know if it's right. If it isn't please help me, as I am struggling with it. Thank you.
10. (Original post by Zonyali123)
Hello I have tried working out question 9, but I don't know if it's right. If it isn't please help me, as I am struggling with it. Thank you.
When doing these kinds of questions, you can only use rules that you've learnt e.g. alternate angles, angles on a straight line etc. If there's something that is not obvious then you can't assume it's true even if the angles may look the same. E.g. you have said that p = 40. But the 40 angle and p don't form a Z or an F - there is no connection between these two angles so you can't assume they're the same.

Instead, you can find the angle to the left of the 133 angle using 'angles on a straight line'. Then you should be able to spot two sets of alternate (Z) angles.
11. (Original post by notnek)
When doing these kinds of questions, you can only use rules that you've learnt e.g. alternate angles, angles on a straight line etc. If there's something that is not obvious then you can't assume it's true even if the angles may look the same. E.g. you have said that p = 40. But the 40 angle and p don't form a Z or an F - there is no connection between these two angles so you can't assume they're the same.

Instead, you can find the angle to the left of the 133 angle using 'angles on a straight line'. Then you should be able to spot two sets of alternate (Z) angles.
I'm a bit confused is p 47 and then 180-47=133 so o is 133. It's probably wrong because I'm confused. Are the other questions I've posted right? Thank you
12. (Original post by Zonyali123)
I'm a bit confused is p 47 and then 180-47=133 so o is 133. It's probably wrong because I'm confused. Are the other questions I've posted right? Thank you
p is correct but you can clearly see that o can't be 133 - it's too small. Look for another pair of alternate (Z) angles that includes 'o'.

For the other set of questions, since I don't have time right now I recommend starting a new thread since you're more likely to get a response to an unanswered thread.
13. Ok no worries. Is o also 47?
14. (Original post by Zonyali123)
Ok no worries. Is o also 47?
No - I think you may be guessing here.

You need to look for a Z to find alternate angles. The 'o' angle is alternate to the 40 angle so 'o' must be 40. Can you see that?
15. (Original post by notnek)
No - I think you may be guessing here.

You need to look for a Z to find alternate angles. The 'o' angle is alternate to the 40 angle so 'o' must be 40. Can you see that?
I can see that yes, and I did say that in my first or second answer, but I thought you said it's wrong.
16. (Original post by Zonyali123)
I can see that yes, and I did say that in my first or second answer, but I thought you said it's wrong.

When I was helping you find 'o', I had forgotten that you already found it correctly in your first post.

Sorry for any confusion
17. (Original post by notnek)

When I was helping you find 'o', I had forgotten that you already found it correctly in your first post.

Sorry for any confusion
Ok no worries. Thanks for helping and making me understand it. I think I should just practice and practice.

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