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CALCMAPS - Map Tools
Geometry - GeoGebra
GmapGIS - Draw on Google maps; Label, save & share maps
Measure—ArcGIS Pro | Documentation - Esri
Protractor - Chrome Web Store
Online Protractor | Angle Measuring Tool - Ginifab
On Screen Protractor Free Exact Protractor
Online protractor & angle maker | interactive angle visualiser
Draw & Measure on Map Tool: Free, Easy, No Login Required
Online Protractor To Measure Angles Anywhere