Answer: Scalene means "a triangle that has three unequal sides"
therefore it is D
The angle of rotation is the minimum angle in which you rotate a regular polygon such that the figure appears unchanged. The formula for that is dividing one angle of revolution by its number of sides.
Angle of Rotation = 360°/n
Angle of Rotation = 360°/72 = 5°
Supplementary would be like 6&7 or 2&3 and vertical would be like 6&8 or 7&5
Did the math the comment bro is right it’s 56