One angle formed between a rectangle's diagonals is 60 degrees. What is the other angle?
Let the 2 angles formed between the diagonals of rectangle be angles 1 and 2.
From diagram it can be observed that angles 1 and 2 are supplementary.
Hence sum of 2 angles is 180 degrees.
Hence for our question, one angle of 60 degrees is known. The other angle is 120 degrees.