If the question is in the context of the flight of a projectile, the answer is none.
For a projectile launched at an angle θ, the range is the same for angles of θ and (90-θ) degrees. This is because the horizontal and vertical components of the initial velocity are the same for these angles, resulting in the same horizontal range.
because 30 and 60 makes 90
The interior angles can have any value in the range (0, 360) except 180 degrees and the same for the exterior angles. The only constraint is that the sum of the exterior angles is 360 degrees.
same side angles add upt to 180 degrees.
At a certain angle - 45 degrees if the starting point and end point are at the same level, and air resistance can be ignored - and at a certain speed, the range is maximum. Both for lower and for higher angles, you get a lower range.
Complementary angles refer to angles that add up to 90 degrees. When launching a projectile at complementary angles, the vertical components of the velocities cancel out, resulting in the same range for the projectile regardless of the angle of launch. This is because the horizontal component of the velocity, which determines the range, is the same for both angles.
Without going into a large Calculus based proof, if two angles of projection are complementary (add to 90 degrees) then the ranges are the same. A 45 degree angle yields the greatest range, but 40 degrees and 50 degrees would yield the same range, so would 30 degrees and 60 degrees. Similarly, 0 degrees and 90 degrees would also have the same range (a range of zero, that is).
same measure ... number of degrees
An octagon has 8 angles. An octagon has the same number of angles as it does sides. Eight. All of the angles measure 135 degrees, and all the angles together are 1080 degrees.
Congruent
Conruent angle
Yes they are