What is the angle formed by the diagonals of two adjacent surfaces of a cube? A) 45
B) 60
C) 90
D) 30
E) None of these
Answer: B
Draw from two adjacent surfaces of a cube the diagonals.
Now see that it forms an equilateral triangle if we draw a third diagonal i.e diagonal in green color.
Thus angles of the triangle will be 60 degrees; hence the answer.
