if you still don't get it from ghostwalker's help, find AN using pythagoras. Thats the first step.
o i get it. since triangle DMN and AMN are congruent (SAS), i could first find AN using Pyth. th. then AN=ND and use Pyth th. again to find out CD. am i right?
o i get it. since triangle DMN and AMN are congruent (SAS), i could first find AN using Pyth. th. then AN=ND and use Pyth th. again to find out CD. am i right?
Q4. Difficult to just give a hint here. But, focus on the equiliteral triangle with a perpendicular dropped, and the ratio of lengths, also consider similar triangles.
Q4. Difficult to just give a hint here. But, focus on the equiliteral triangle with a perpendicular dropped, and the ratio of lengths, also consider similar triangles.