reflex angle

Beyond straight line

A reflex angle is an angle measuring more than 180 degrees but less than 360 degrees—the larger of the two angles formed when two lines meet at a point.

While most everyday angle references describe the smaller, more obvious measurement, a reflex angle captures the remainder of the full rotation: The reflex angle of a 60-degree corner is 300 degrees.

geometry

obtuse

Lacking mental sharpness

convexCurved outward externally
vertexPoint where edges converge
arcCurved line segment

rotation · supplementary · complementary · transversal · protractor · degrees · radians · circle · sector · polygon

measurement

degrees

Units of measurement

radiansAngle measurement units
protractorAngle-measuring instrument
arc lengthCurved segment's measure

rotation · turns · clockwise · counterclockwise · bisect · full circle · sweep · subtended · inclination · bearing

drafting

compass

Device showing cardinal directions

technical drawingPrecise specification illustration
blueprintDetailed technical drawing
schematicSimplified technical diagram

CAD · engineering · architecture · design · plotting · construction · diagram · illustration · specification · scale drawing

Opposites

angular magnitude

reflex angleacute angle

Below ninety degrees

obtuse angle · right angle · small angle · narrow angle · sharp angle

convexity/concavity

reflex angleinterior angle

Angle inside a polygon

Family

angle, reflect, triangle, reflects, reflection, reflex, rectangle, reflective, angular

Familiarity: Top 500,000
Profile: Used worldwide · Timeless · Rated G