semicircle
Diameter-bounded half-arc
A semicircle is half of a circle—the shape formed when a diameter cuts a circle in two.
The term extends to anything arranged in this arc shape: The students sat in a semicircle around the teacher.
In geometry, a semicircle includes the diameter as its base and the curved arc above it.
Curved sickle-like arc
- archCurved spanning structure
- bowRespectful forward inclination
- curveSmooth, angleless line
- roundCurved like circle
curved · sweep · bend · dome · lunette · segment · quadrant · convex
Open-air tiered venue
- apseVaulted church recess
- archCurved spanning structure
- vaultSecure storage chamber
- nicheRecessed wall space
rotunda · arcade · colonnade · portico · fanlight · lunette · window · doorway
Curved line segment
- radiusCenter-to-perimeter distance
- diameterDistance across through center
- chordNotes sounded simultaneously
- circumferenceCircle's outer measurement
sector · bisect · protractor · compass · degrees · 180 · pi · tangent
Close protective gathering
- formationCreation or arrangement
- gatheringCollection of people meeting
- seatingAvailable places to sit
- arrayOrdered collection or display
cluster · assembly · configuration · horseshoe · storytelling · campfire · discussion · presentation
crescent
Curved sickle-like arc
round · curved · sweep · bend · dome · lunette · segment · quadrant · convex · concave
amphitheater
Open-air tiered venue
niche · rotunda · arcade · colonnade · portico · fanlight · lunette · window · doorway · alcove
arc
Curved line segment
- radiusCenter-to-perimeter distance
- diameterDistance across through center
- chordNotes sounded simultaneously
circumference · sector · bisect · protractor · compass · degrees · 180 · pi · tangent · perimeter
huddle
Close protective gathering
array · cluster · assembly · configuration · horseshoe · storytelling · campfire · discussion · presentation
- geometryangles, circles, angle, shapes, lines
- Semi- wordssemifinal, semicolon, semiconductor, semitruck, semi truck
- curved shapescrescent, arc, horseshoe, parabola, bend
- fan shapeshand fan, folding fan, paper fan, Japanese fan, Spanish fan
- geometry termsline, rectangle, side, square, triangle
- circlesradius, circumference, pie chart, ring, disk
semicirclefull circle
Return to origin
circle · full rotation · 360 degrees · quarter circle · quadrant
semicirclestraight line
Undeviated continuous path
rectangle · square · triangle · polygon · line segment
- semicircular canalEar's rotation detector