2006 exam 1 - geom trig BEARINGS question?

[xoxogossipgirl]

bearings are killing me just quietly.
i'm at the point where i'm thinking i'm gonna have to accept i'll lose marks on bearings, and go on and study everything else coz i just can't get better at them.
2006 VCAA exam 1, geometry and trig question 9
can someone explain it to me like i'm a completely dumbass, coz the examination report isn't making sense to me?
thank you

[LFTM]

i don't do this module, but love the username.

[Xavier1234]

bearings are killing me just quietly.
i'm at the point where i'm thinking i'm gonna have to accept i'll lose marks on bearings, and go on and study everything else coz i just can't get better at them.
2006 VCAA exam 1, geometry and trig question 9
can someone explain it to me like i'm a completely dumbass, coz the examination report isn't making sense to me?
thank you

all the question is asking you is to be able to recognize the fact that given the equal distances of line OM and OP, they must be in one circle. alternatively, you could think about it like 'they fall under the same radius', hence they must be the same. I would label it top or bottom or as the assessment report goes, north or south. Now from drawing the diagram, you would automatically know that line NS is at a 180 degrees. if you fill in the gaps in the triangle, you will find that the TOP angle is larger than the BOTTOM angle. alternatively, the northern angle is greater than the southern angle. hence upon applying mathematical logic, it has to be between 180 to 270 degrees true. hope that helps 

[xoxogossipgirl]

thank you in to my cheatbook it goes...