Maths exam IGCSE - HIGHER TIER - PAPER 3H AND PAPER 4H POST DISCUSSION.

no your were meant to because you did 3-1 and 1-3 to account for all situations. I wrote 2a x 2b and 2b x 2a

so it 3/20 right then maybe?

also @taranc
I think the radius was 5.4cm and the angle 72 degrees. so to find the shaded segment you would find the area of the whoel segment (72/360 x pie x r^2) which equals 18.32176836 - the area of the triangle and u needed to use the formula 1/2 ab Sin C = 13.86640401
18.32176836-12.858 = 4.455
i hope that's right :/

So what would you guys say would be a good mark for this test if you're aiming for an A*. 85? 90? Idk what do you think?

just wondering, i put n=10 for the question on the n sided polygon. I didnt use working out but i drew the shape instead. Any idea how many marks i will get despite little working ?

also @taranc
I think the radius was 5.4cm and the angle 72 degrees. so to find the shaded segment you would find the area of the whoel segment (72/360 x pie x r^2) which equals 18.32176836 - the area of the triangle and u needed to use the formula 1/2 ab Sin C = 13.86640401
18.32176836-12.858 = 4.455
i hope that's right :/

ahh I cant believe i didnt read the question properly and missed the unit change on first page and also question 18 was so hard..i know this is going to sound stupid but I'm really worried that my working won't show up or something because for the questions I did my working in pencil... arghh.. it was HB though...i really hope its ok and also for the region question did you get like a little triangle in the middle-area??