Angle Explorer
Set any measure from 0° to 180° and watch the angle draw itself — with its classification, the family it belongs to, and the notation for lines, rays, and segments.
1 Explore an angle
Drag the slider or type a measure. The tool draws the angle, names its family, and tells you how close it is to the next landmark.
degrees
Landmarks: 0° (zero), 90° (right), 180° (straight). Everything else is acute or obtuse.
Classification
Acute
2 Line, ray, or segment?
Pick a figure to see its diagram, its definition, and its notation.