straight angle
One-eighty in degrees
A straight angle is an angle of exactly 180 degrees, forming a straight line.
The two rays extending from the vertex point in opposite directions.
It represents the boundary between angles less than 180 degrees and reflex angles greater than 180 degrees.
Line-drawing tool
- compassDevice showing cardinal directions
- protractorAngle-measuring instrument
- rulerOne who governs
- drawCreate with pencil
Continuous mark or queue
- linearArranged in straight succession
- vertexPoint where edges converge
- rayNarrow light emission
- EuclideanFlat-space geometry type
plane geometry · straightedge · parallel lines · transversal
Line splitting something equally
- midpointExact center between two
- rayNarrow light emission
- divideSeparate into parts
- halveDivide into two
90 degrees · equidistant · partition · split · construction · compass
Angle of a straight line
- protractorAngle-measuring instrument
- degreeUnit of measurement
- semicircleHalf a ring
- supplementaryServing to complete
collinear · vertex · ray · arms · rotation · revolution · turn · arc
straightedge
Line-drawing tool
- compassDevice showing cardinal directions
- protractorAngle-measuring instrument
- rulerOne who governs
draw · measure · line segment · ray · vertex · diagram · drafting
line
Continuous mark or queue
Euclidean · plane geometry · straightedge · parallel lines · transversal
bisector
Line splitting something equally
halve · 90 degrees · equidistant · partition · split · construction · compass
180 degrees
Angle of a straight line
- protractorAngle-measuring instrument
- degreeUnit of measurement
- semicircleHalf a ring
supplementary · collinear · vertex · ray · arms · rotation · revolution · turn · arc
straight anglereflex angle
Between 180° and 360°
acute angle · right angle · obtuse angle · sharp angle · oblique angle
straight, angle, straighter, straightest, straighten, straightened, straightening, straightener, straightness