IGCSE mathematics extended paper 42 post your answers!

[Chucky]

the two sides of each triangle belonged to the squares, so they were of equal lenth and the corresponding angles were equal as well.
congruency is in the syllabus, and i know all congruent triangles are similar, but the marks here are specific.

the circle theorem answer is 138, because angle CDE and the angled marked 42 degrees were opposite sides in a cyclic quadrilateral
sum of opposite angles are equal to 180
therefore 180-42= 138

 

[Chucky]

simultaneous answers were in decimals, near 0.sometihng and 1.1 ish i cant remember exactly

 

[Lostsoul]

simultaneous answers were in decimals, near 0.sometihng and 1.1 ish i cant remember exactly

I guess 0.85 and 055

 

[Reem2195]

I guess 0.85 and 055

that's what I wrote too

 

[Reem2195]

I don't quite remember but for the circle theorem question, I think two answers were the same but for different reasons?

 

[Chucky]

I don't quite remember but for the circle theorem question, I think two answers were the same but for different reasons?

probably, alternate angles and the other one i forgot

 

[Mrskeptikal]

ya thats correct im gonna upload the mark scheme for paper 2 and 4 by my teacher but ill wait a week just to make sure everyone has done it

Can you please inbox me the markscheme?

 

[Reem2195]

Can you please inbox me the markscheme?

He already posted them,
http://www.xtremepapers.com/communi...-may-june-2012-papers-22-and-42-marked.15422/