Circle

https://i.na.cx/1WKC2h.png

1. In the figure, the two circles intersect each other at A and B. O is the centre of the smaller circle OBC and OAE are straight lines. If AB = BC, find ∠CDE



https://i.na.cx/KkyxH2.png

2. In the figure, ABC and EDC are straight lines. Which of the following is/are true?

i) △ABE ~ △ADE
ii) △CBD ~ △CEA
iii) △ADC ~ △EBC