zawierua23 Works
Sum of Interior Angles in a Triangle
Investigating the Interior Angle Sum vs. Number of Sides
Vertical Angles
Broken Protractor: Guess-Estimate Angle Measures and Verify
Finding Missing Angle in a Triangle
Supplementary Angles: Visualizing a Pair That Always Sums to 180°
Angles on One Side of a Line: Completing the Straight Angle
Definition of Complementary Angles - Interactive Applet
Line Segment Length and Midpoint Coordinates on the Coordinate Plane
Basic Geometric Figures - Illustration & 4 Questions
Theodorus (Pythagorean) Spiral: Irrational Lengths from Repeated Right Triangles
Interactive Demo: Points, Lines, Rays, Segments & Angles
Triangle on a Line with Missing Angle Measures
Complementary Angle Measurement Practice
Dynamic Demo of the 5 Angle Types: Acute, Obtuse, Right, Straight, Reflex
Intro 2: GeoGebra Skills, Geometric Terms, and Postulates
GeoGebra Basics: Terms and Postulates Introduction
A Dynamic Proof of the Triangle Angle Sum Theorem (180°)
Supplementary Angles Practice: Find the Missing Angle (GeoGebra Interactive)
Protractor Practice: Build an Angle, Then Measure It
Exploring Medians and Altitudes in a Triangle
Triangle Centroid and Median Ratio (2:1)
Random Protractor Practice: Measuring and Constructing Angles