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Because it is easier to use. If a right angle were to be 100 degrees when you compare it to 90, 90 has a lot more factors than 100. It's probably in the ancient days when people made it like that.
None All shapes would be 360 degrees not 380 look at a circle , square, octagon etc.
360 degrees
If A and B are the angles, then A + B = 180 and A - B = 20 So that 2A = 200 ie A = 100 and then B = 80 So the two angles are 100 and 80 degrees.
A straight line in angles represents 180 degrees.
Because it is easier to use. If a right angle were to be 100 degrees when you compare it to 90, 90 has a lot more factors than 100. It's probably in the ancient days when people made it like that.
None All shapes would be 360 degrees not 380 look at a circle , square, octagon etc.
Exterior angles add up to 360 degrees Interior angles add up to 17,640 degrees
They are four angles which are equal. They could be 4 angles of a pentagon measuring 100 degrees, where the fifth measures 40 degrees.
The answer is hexagon
360 degrees
Angles are measured in degrees. It is degress 100% sure.
The sum of the measures of the angles in any triangle in the plane is 180 degrees. If two angles are 15 and 85 then their sum is 100 degrees and 180-100=80 degrees
If A and B are the angles, then A + B = 180 and A - B = 20 So that 2A = 200 ie A = 100 and then B = 80 So the two angles are 100 and 80 degrees.
A straight line in angles represents 180 degrees.
Total interior angles: (100-2)*180 = 17,640 degrees
External angles would total 360 degrees; internal angles would total 14,400 degrees.