adjacent angles
Angles sharing side
Adjacent angles share a common vertex and a common side, with their other sides on opposite sides of the shared side.
The two angles together form a larger angle: The adjacent angles measured 30° and 45°, forming a 75° angle.
In geometry problems, adjacent angles often appear when a line intersects parallel lines or when angles share a ray.
Point where edges converge
- rayNarrow light emission
- degreesUnits of measurement
- protractorAngle-measuring instrument
- EuclideanFlat-space geometry type
Situated beside another
- borderingSharing an edge with
- side-by-sidePositioned next to another
- contiguousSharing a common boundary
- abuttingSharing a common border
next to · adjoining · consecutive · touching
Line crossing multiple others
- parallel linesEquidistant throughout their length
- intersection pointWhere two lines meet
Serving to complete
- straight lineUndeviated continuous path
- 180 degreesAngle of a straight line
- collinearOn the same line
- straight edgeUnbent measuring tool
vertex
Point where edges converge
- rayNarrow light emission
- degreesUnits of measurement
- protractorAngle-measuring instrument
Euclidean · plane geometry · interior · diagram · construction
neighboring
Situated beside another
- borderingSharing an edge with
- side-by-sidePositioned next to another
- contiguousSharing a common boundary
abutting · next to · adjoining · consecutive · touching
transversal
Line crossing multiple others
- parallel linesEquidistant throughout their length
- intersection pointWhere two lines meet
supplementary
Serving to complete
- straight lineUndeviated continuous path
- 180 degreesAngle of a straight line
- collinearOn the same line
adjacent anglesvertical angles
Congruent angles from intersecting lines
opposite angles · corresponding angles · supplementary angles
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