Theorem 1.1 - 1.3 (Chords of circles)
Instructions
Drag the point B to observe
1. the relationship between BD and CD, and
2. the relationship between AD and BC.
Theorem 1.1 - 1.3
If AD is perpendicular to BC, BD =
Theorem 1.1 - 1.3
If BD = CD, then ADC =___.