Triangle Congruence Conditions
by Anonymous
Pick SSS, SAS, ASA, AAA or SSA and drag the sliders to see whether the triangle is uniquely determined or several different ones appear.
About this app
Triangle Congruence Conditions is an interactive middle-school geometry app for exploring when given measurements determine exactly one triangle. Experiment with SSS, SAS, ASA, AAA, and SSA by changing side lengths and angles with sliders, then identify marked congruence conditions and answer challenge questions. The app highlights why SSS, SAS, and ASA prove congruence, while AAA gives similar triangles and SSA can be ambiguous.
Use cases
- Middle-school students learning triangle congruence
- Teachers demonstrating construction and ambiguous cases
- Independent practice with SSS, SAS, ASA, AAA, and SSA
- Geometry review through short identification and quiz challenges
Features
- Slider-based triangle experiments for five measurement conditions
- Visual feedback showing zero, one, two, or infinitely many possible triangles
- Rule-identification activities based on marked sides and angles
- Challenge questions with scores, streaks, and stars
- Guided missions covering SSS, SAS, AAA, and SSA
- Reset and next-question controls