";s:4:"text";s:3863:" Practice 12 0'clock (Major) 9 0'clock (minor) 10 0'clock (minor) 11 0'clock (Major) 12 0'clock (Major). 2. It implies that if two chords subtend equal angles at the center, they are equal. If two chords intersect inside of a circle, the product of the lengths of their respective line segments is equal. Practice the chords around the circle to the LEFT 3. Understanding and writing your own chord progressions is an important skill for both musicians and songwriters.It’s important to listen to the harmony in well-known songs; learning chordal relationships and popular progressions that could be used in your future career. Theorem 1: Equal chords of a circle subtend equal angles at the center. We’ll you’re in the right place because that’s what this geometry lesson is all about.You’ll learn how to quickly find the missing measurements or indicated variables in all kinds of problems dealing with Chords and Arcs of a Circle.There are some fundamental theorems and definitions involving chords of a circle.As seen in the diagram to the right, if arc AB is congruent to arc CB, then segment AB is congruent to segment CB and vice versa.And this property holds true for congruent circles as well. The diameter is a special kind of chord that passes through the center of a circle. To prove : AC = BC.