Thank you so much!!! Now I understand that there is another isosceles triangle!!! You made me realised why I am stuck at this question cuz my angles (to be honest) is very good but somehow I don't know how to do this question so thank you!! :)))

Yes. Be careful on question with circle. All radii are same length and I realized, normally question won’t mark it for students.

And 1 more information. Normally the angle given by question, have to use it to find answer. For this case, angle 58. So, can narrow down your finding. Hope you success in PSLE exam. Good luck.