Regular Octagon Geometry Diagram - Interior Angle 135° Explained #194548 (License: Personal Use)

This image displays a regular octagon filled with solid cyan blue and outlined in black, with one interior angle labeled "135°" in dark blue text near the bottom-left vertex. In a regular octagon, all eight sides and angles are equal, and the interior angle is calculated as (n-2)×180°/n = 6×180°/8 = 135°. The clean, minimalist design emphasizes geometric precision and educational clarity.

Used in math education resources, geometry textbooks, online tutorials, or interactive learning platforms to illustrate polygon angle properties; matches user intent for visual confirmation of octagon angle calculations.