Maths question 0580/43. IGCSE - May

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ronald1673
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link
https://www.exam-ate.com/pastexams/1..._s15_qp_43.pdf

Cannot copy the problem . so pasting the link
Need help on question 6c
I do have the answers but don't understand how to solve it. Need explaination on the same. would appreciate if one can let me know which chapter/lesson to study.
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mqb2766
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(Original post by ronald1673)
link
https://www.exam-ate.com/pastexams/1..._s15_qp_43.pdf

Cannot copy the problem . so pasting the link
Need help on question 6c
I do have the answers but don't understand how to solve it. Need explaination on the same. would appreciate if one can let me know which chapter/lesson to study.
Should just be similar triangles using "Angles Subtended by Same Arc", so the areas would be the same ratio as their sides (squared).

Edit - can't help with the chapter, but this is one of the standard circle theorems
https://revisionmaths.com/gcse-maths...ircle-theorems
Also, paper link didn't work for me, hope this is the one
http://www.teachifyme.com/wp-content...n-Paper-43.pdf
Last edited by mqb2766; 3 years ago
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ronald1673
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(Original post by mqb2766)
Should just be similar triangles using "Angles Subtended by Same Arc", so the areas would be the same ratio as their sides (squared).

Edit - can't help with the chapter, but this is one of the standard circle theorems
https://revisionmaths.com/gcse-maths...ircle-theorems
Also, paper link didn't work for me, hope this is the one
http://www.teachifyme.com/wp-content...n-Paper-43.pdf
Thanks, your link is also correct. I am bit weak in this, still did not understand how the area is calculated. as Y is not the centre of the circle?. A little more of detail would help, if possible thanks
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mqb2766
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(Original post by ronald1673)
Thanks, your link is also correct. I am bit weak in this, still did not understand how the area is calculated. as Y is not the centre of the circle?. A little more of detail would help, if possible thanks
Other people have put more effort into describing it (well) at
https://www.bbc.com/bitesize/guides/z3c7tv4/revision/3
https://www.mathsisfun.com/geometry/...-theorems.html
just google the phrase I gave you? This theorem does not require the intersection point to be the center of the circle.

Edit. Is it the circle theorem you don't understand, the fact they're similar triangles, or the length & area ratios?
Last edited by mqb2766; 3 years ago
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