Exterior angle + interior angle = 180 Hence Interior Angle = 180 - Exterior Angle The Exterior Angle = n(No. of sides ) / 360 Substituting Interior Angle = 180 - (n/360) Interior Angle = 180 - (18/360) Interior Angle = 180 - (1/20) Interior Angle = 179.95 degrees.
The question can be answered only if the 20-gon is regular - ie all its angles are the same. IF that is the case, then: The sum of the exterior angles of any polygon is 360 degrees. Since there are 20 exterior angles, each of them must be 360/20 = 18 degrees.
20 degrees and the two equal angles will be 80 degrees each
Any triangle that has an angle measuring 90 degrees is a right triangle.
20 degrees. the definition of a supplementary angle is two angles that add up to 180 degrees.
If it's regular then 360/20 = 18 degrees
The exterior angle of a 18 sided shape is 360/18 =20 degrees The exterior angle is always 360 divided by the numbe of sides of that polygon. =) what the hell im i doing answering this?
Each exterior angle measures 20 degrees Each interior angle measures 160 degrees
It is: 160 degrees
18 degrees
If it is a regular polygon then each exterior angle is 360/20 = 18 degrees
Exterior angle measures 18 degrees Interior angle measures 162 degrees
20 degrees
Exterior angle = 20 degrees Interior angle = 160 degrees
Providing that it is a regular 20-gon then each exterior angle is 360/20 = 18 degrees
The sum of the exterior angles of any (closed) shape will always be 360 degrees. The exterior angles of any polygon always add up to 360 degrees * * * * * The second of the above two answers is more accurate. A closed shape can be a circle, which does not have exterior angles.
Exterior angle = 360/20=18 interior angle = 180 - 18 = 162 Must be regular shape