Linked from
The 16 pages that link to Interior angle, each with the reason it gives.
Equilateral triangleRelated: Each interior angle here measures exactly 60 degrees.
PolygonBroader topic: The angles at a polygon’s vertices help determine its shape and area.
Regular polygonRelated: Equal interior angles are one of the defining conditions for regularity.
TessellationRelated: Angles meeting at a tessellation vertex must add to 360 degrees.
Vertex (geometry)Related: The sides meeting at a polygon vertex determine its interior angle.
QuadrilateralRelated: The four interior angles of every quadrilateral sum to 360 degrees.
Convex polygonRelated: Every interior angle of a convex polygon is less than 180 degrees.
Schwarz–Christoffel mappingRelated: Each angle fixes an exponent in the mapping derivative.
Exterior angle theoremRelated: The theorem compares the exterior angle with two interior angles.
DecagonRelated: The ten interior angles determine a decagon’s total angle sum.
Erdős–Nagy theoremRelated: Concave vertices mark the inward turns that create pockets.
Law of cotangentsRelated: A, B, and C denote the triangle’s interior angles.