Analog Clock: Interactive Practice with Digital and Hand Times

① This example demonstrates an interactive analog clock where users can hide or reveal the clock hands to practice matching a given digital time, or hide the digital display to practice reading the hands. ② Core math concepts include the relationship between time and angles (hour hand rotates 30° per hour, minute hand 6° per minute), modular arithmetic (Mod) for computing hand positions, and circle geometry. ③ Construction highlights: uses GeoGebra commands Circle for the face, OrthogonalLine and Intersect for reference lines, Rotate and Sequence for tick marks and hands, Segment for drawing hands, Mod for calculating minutes and hours, Point for positioning numerals, and sliders (circlesize, hourlength, minutelength) to adjust appearance. ④ Suitable for elementary to middle school students learning time reading, angle measurement, and basic geometric construction, as well as classroom demonstrations of the angle-time relationship.