I don't know I'm stuck on it too!
It has 18 interior angles.
Glade Interface Designer was created on 1998-04-18.
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.
Interior angles of a regular 18 gon (octdecagon) are 160o.
The interior angles of an 18 sided polygon add up to 2880 degrees
The sum of the interior angles are (18-2)*180 = 2880 degrees
The interior angle of an octdecagon, an 18 sided regular polygon, is 160o.
Any angle that you like. The only constraint is that the sum of all 18 interior angles is 2880 degrees.
Providing that it is a regular 18 sided polygon each interior angle measures 160 degrees.
Exterior angle = 360/20=18 interior angle = 180 - 18 = 162 Must be regular shape
For an 18-sided polygon (octadecagon), the formula to calculate the interior angle is ((n-2) \times 180° / n), where (n) is the number of sides. Substituting (n = 18), the interior angle is ((18-2) \times 180° / 18 = 160°). The exterior angle can be found using the formula (360° / n), which gives (360° / 18 = 20°). Therefore, each interior angle is 160° and each exterior angle is 20°.
Interior angle measure of a 18-gon = [180⁰(18 - 2)]/18 = 10⁰(16) = 160⁰. Exterior angle measure = 180⁰ - 160⁰ = 20⁰.