Concentrate on NVC. That is right rectangle triangle, and we know the two legs.
Hi i still don know how to do. I don really know what the qn is asking.i cant really see the angle. Is it a 3D angle or the 2D angle( the angles at the triangle. Meaning the two angles added tog ether.) I hope u can understand what im talking. Pls help me thanks.
Alright, imagine a plane that contains points A, N, C, D. Disregard all other parts of the pyramid. Now you simply have a triangle ACV. The solution must be obvious now. Try to draw a picture of this triangle - it might help a lot.