I think that the answer is f...
Answer:
THE ANSWER IS A SPHERE
Step-by-step explanation:
Because it is a 3-dimensional, perfectly round and has solid surface.
The sum of opposite angles are equal, so two of the angles are 45°. The sum of all angles about the intersection of two lines is 360°. So the remaining two angles are found by:
α=(360-2*45)/2
α=135° thus all four angles are:
45°,135°,45°,135°
