Linked from

The 47 pages that link to Angle, each with the reason it gives.

• Euclidean geometryRelated: Angles describe turns and are central to triangles, parallel lines, and constructions.

• TriangleNarrower topic: The three interior angles distinguish a triangle’s shape and always total 180 degrees in Euclidean geometry.

• LatitudeNarrower topic: Latitude is an angle measured relative to the equatorial plane.

• RadianNarrower topic: A radian is a unit used to measure this geometric quantity.

• Anglo-Saxon EnglandRelated: Their settlement contributed to the identity and language of early England.

• Old EnglishRelated: Their name became linked to the land and language called English.

• Inner productRelated: The inner product determines angles between nonzero vectors through cosine.

• Right triangleNarrower topic: The 90-degree angle is the feature that defines this triangle.

• Solid angleNarrower topic: Solid angle extends the same angular idea from a plane to three-dimensional directions.

• Trigonometric functionsNarrower topic: Angles are the inputs whose geometric relationships these functions encode.

• OrthogonalityRelated: For nonzero real vectors, a zero inner product corresponds to a right angle.

• Anglo-Saxon settlement of BritainRelated: Their name contributed to the later names England and English.

• TrigonometryNarrower topic: Trigonometric functions take angles as inputs.

• Unit circleNarrower topic: An angle determines where a point lies as it moves around the circle.

• Degree (angle)Narrower topic: A degree quantifies this geometric quantity.

• Dimensionless quantityRelated: Angles are dimensionless ratios, though radians remain useful named units.

• GeometryBroader topic: Angles quantify turning and determine many relationships among intersecting lines and shapes.

• TheodoliteNarrower topic: Theodolite readings are measurements of horizontal and vertical angles.

• AzimuthNarrower topic: Azimuth applies the general idea of an angle to a reference direction and a target.

• Perpendicular bisectorNarrower topic: A right angle specifies how the bisector meets the segment.

• Conformal mapRelated: Conformality is defined by preserving angles between intersecting curves locally.

• CosineNarrower topic: Cosine takes an angle as its input.

• Interior angleNarrower topic: An interior angle is a polygon-specific angle.

• Perpendicular linesNarrower topic: Perpendicularity is defined by the measure of the angles formed at the intersection.

• Angle bisectorNarrower topic: An angle bisector divides this figure into two equal parts.

• Cross-ratioCompared with: Angles are not projective invariants, unlike the cross-ratio of four collinear points.

• Polar coordinate systemNarrower topic: Polar coordinates use an angle as one of two position values.

• Central angleNarrower topic: A central angle is a specific kind of angle distinguished by its vertex.

• Rotational symmetryRelated: The rotation angle determines which transformations can preserve the object.

• Right angleNarrower topic: A right angle is a specific kind of angle, distinguished by its measure.

• TangentNarrower topic: Tangent takes an angle as its input.

• Angle bisector theoremNarrower topic: The theorem begins with a triangle vertex angle divided into equal parts.

• Stereographic projectionRelated: Preserving angles is the defining local geometric property of this projection.

• Directed angleNarrower topic: Directed angles extend ordinary angle measure by distinguishing rotational direction.

• Ray (geometry)Related: Rays provide the two sides and shared vertex of an angle.

• TransversalNarrower topic: Each intersection with a transversal produces angles to compare.

• BearingNarrower topic: A bearing is a specialized angle constrained to a horizontal plane and a reference axis.

• Sine and cosineNarrower topic: Sine and cosine take angles as inputs and repeat after a full rotation.

• GradianNarrower topic: A gradian is one unit used to measure angles.

• Exterior angle theoremNarrower topic: The theorem is an equality among three angle measures.

• Inversive geometryRelated: Inversion preserves the magnitude of angles between intersecting curves, though it reverses orientation.

• Pie chartNarrower topic: Pie charts use angle as a visual measure of category share.

• MilliradianNarrower topic: Milliradians measure angles, using a scale convenient for small directional changes.

• TiltmeterNarrower topic: Tilt is an angular quantity, usually reported relative to a reference direction.

• Geometry (configuration)Related: Angles distinguish arrangements that have the same distances but different orientations.

• Hinge theoremNarrower topic: The included angle is the comparison that determines the opposite-side ordering.

• Internal and external anglesNarrower topic: Interior and exterior angles are specific arrangements of rays at polygon vertices.