To work this out, all the external angles of any shape add up to 360°, so all we need to do to work the external angle out is divide 360° by the number of sides giving us a sum of 360 divided by 8 sides = 45°; so now we have the exterior angle we can easily find the internal angle, we do this by subtracting the external angle which in the case of an octagon is 45° from 180° thus giving us 135°, of course this is only going to work on a regular shape with equal sides as an irregular shape is going to have different angles but will still total 360°.
The interior angle of a regular octagon is 135° and the external 45°.
By tash2010
a.45
5
An interior angle of a regular octagon is 45 degrees. The exterior angles measure 315 degrees.
Providing that it is a regular octagon: Exterior angle: 45 degrees Interior angle: 135 degrees
It is a regular 8 sided octagon whereas each interior angle is 135 degrees and each exterior angle is 45 degrees.
135 degrees and its exterior angle is 45 degrees
180 minus interior angle = exterior angle
An interior angle of a regular octagon is 45 degrees. The exterior angles measure 315 degrees.
Each interior angle of an 8 sided regular octagon is 135 degrees and each exterior angle is 45 degrees
Providing that it is a regular octagon: Exterior angle: 45 degrees Interior angle: 135 degrees
It is a regular 8 sided octagon whereas each interior angle is 135 degrees and each exterior angle is 45 degrees.
Exterior angle: 45 degrees Interior angle: 135 degrees
135 degrees and its exterior angle is 45 degrees
an octagon (8-sided)
180 minus interior angle = exterior angle
It is a regular octagon which has 8 sides
Each exterior angle: 45 degrees Each interior angle: 135 degrees
Exterior: 45 degrees Interior: 135 degrees
If it is a regular 8 sided octagon then each exterior angle is 45 degrees and each interior angle is 135 degrees.