Can someone tell me if I 'over-assumed' or arrived at the answer incorrectly?
Here's how I looked at this question:
-D is where B meets PR
-I know there's a rule that triangles inscribed in a semi-circle are right triangles. So I concluded that PQR is a right triangle (angle Q is 90)
-Then I reasoned that line B bisects angle Q and splits it into equal angles (I think bisecting lines splits angles in half); therefore angle PQD is 45, and the triangle is 45-45-90.
So all I need to determine B is a value for any of the legs of that triangle.
stmt 1: not sufficient
stmt 2: tells me hypotenuse is sq. root of 84. sufficient.
This is the right answer, but I'm trying to see if I assumed incorrectly, but still somehow ended up with the right answer.
Also, I heard that either in PS or DS questions (not sure which), when you are giving a number, it is usually for a reason. Because I see that I didn't use the value given (5) in this question.
Thanks
