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# IGCSE Geometry problem (mock exam) watch

1. Could you help me pelase?

I have no idea how to solve this problem (unless I use cos and sin rules which lead to pretty tedious several-stages calculations. Too tough for GCSE I think!)

Perhaps you can help me to find an easier way?
Thank you a lot in advance.
L
2. And here it goes.... The problem is:

Attachment 505751505755
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3. the sine and cosine rules are for GCSE
I think I would use the cosine rule for the first question?
4. Yes, sure they are.

But when I tried to use them for both questions in this problem, it lead me to several stages, pretty very tedious, and very not straightforward at some points!
I feel this question is too much for an exam at GCSE level.
What do you think?

Can you perhaps outline your solution?
Maybe I am overcomplicating things?

Do(es) you(anyone) perhaps see any alternative method?

Thank you :-)
5. the first one is the cosine rule and is 7.27 and the second is circle theorem of external intersection and equals 4
6. Great! And thank you SO much! :-)
7. If you want a method for the length of AC:
Attached Images

8. Use cosine rule at first, then intersecting chord theorem (circle theorem) for the rest

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Updated: February 20, 2016
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