Interactive Solver for Unknown Adjacent Angles

This interactive GeoGebra lesson demonstrates how to determine the measure of an unknown adjacent angle given specific angle conditions. It focuses on key angle relationships such as adjacent angles, linear pairs, and how supplementary/complementary angle facts can be used to form equations whose solution yields the unknown angle. Construction-wise, it builds the angle configuration using Angle together with points and rays (Point, UnitVector, Segment), uses Sequence and RandomElement to control steps and/or randomize parameters, employs Circle and CircleArc (with circlePixels) for arc/mark visualization, and uses Length for reading or validating constructed quantities. The workflow is presented through on-canvas text prompts and solution displays (textQuestion, textBeta, textGamma, textSolution) with buttons for solving and resetting (btnSol, btnNew, btnReset, showSolution). Suitable for grades 6–8 and for classroom practice on angle properties and solving for unknowns.