The problem is that I found this question super easy, but everybody came out of the exam saying that the last question (this one) was ridiculous. I'm thinking I might have messed up somewhere, making it "easy".
I already have my answer in my head and put it on the paper (WJEC if you're wondering), but I'll keep it private for now because I don't want to accidentally cause a bias.
Looks like 10% to me, the angle inside the circle is 36 degrees. And if that point is the centre like you say, than those lines are also the radius. So then 36/360xarea = 10% of the area
Looks like 10% to me, the angle inside the circle is 36 degrees. And if that point is the centre like you say, than those lines are also the radius. So then 36/360xarea = 10% of the area