Question

Find a,b,c,d,e,f and g.
Will give medal.

Answer 1

O is the centre point of the circle
PR is // to CD

Answer 2

AOC is a straight line

Answer 3

First of all you can consider AOC as a transversal and find some angles and relations. Can you do that?

Answer 4

i think (a) can be 35
isosceles triange

Answer 5

Right. AOC Is diameter. This means CBA =90 degrees(Angle in a semicircle)

Answer 6

so (c) can be 90-35=55 (right angled triangle)

Answer 7

CBA=a+c

So now you have c

Answer 8

Good :)

Answer 9

Can we apply rule of isosceles triangle in e

Answer 10

Yes!!

Answer 11

Is BOD also a straight line?

Answer 12

so if e is 25 f can be 25 (alt interior angles)

Answer 13

Right!