Rachii Geometry

Turn your iPhone or iPad into a space for exploring geometric construction. Rachii Geometry places illustrated compasses, rulers, protractors and set squares on your canvas. Draw with your finger, or Apple Pencil on a compatible iPad. CONSTRUCT WITH VISIBLE INSTRUMENTS • Set and lock the compass radius, draw circles and arcs, swap its needle and drawing tip, and choose solid or dashed lines. • Use a pen along a ruler or set-square edge. Snap the ruler parallel or perpendicular to existing lines. • Measure angles with a 180° or 360° protractor that snaps to vertices and lines. CREATE AND EDIT • Name points and snap them to nearby lines and intersections. • Insert 48 figure templates: angles, triangles, quadrilaterals, polygons, circles, ellipses, solid wireframes and nets. • Set custom angles from 1 to 360 degrees, including decimals. • Select several objects to move, resize, recolor or delete together. • Erase just the area you rub, with undo and redo. KEEP AND SHARE YOUR WORK • Worksheets save on your device. Open earlier work from the library and restore worksheets from Trash. • A fresh launch starts with a blank canvas while keeping previous worksheets. • Export PDF, PNG or editable .rachiigeo backup files. • Explore equilateral-triangle and perpendicular-bisector examples and review construction steps. Choose Thai, English, Simplified Chinese, Korean or Japanese using the globe button. No account, ads, in-app purchases or subscription. Drawing and local worksheets work offline. Requires iOS/iPadOS 17 or later. Up to 500 objects per worksheet; imported backups up to 20 MB. Solid figures are 2D wireframes. Objects do not maintain dynamic geometry constraints. The app does not automatically sync worksheets across devices.