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Why can't all chords diameters?
The only chords that are diameters are the chords that go through the center of the circle. All of the other chords are shorter.
Can all diameters are chords?
Yes, a diameter can be regarded as a special case of a chord. NB: NOT ALL CHORDS ARE DIAMETERS!
A pair of parallel chords that are not diameters?
just two parallel chords!
When chords intersect in a circle are the vertical angles formed intercept congruent arcs?
Not unless the chords are both diameters.
Are chords diameters?
By definition, diameters are lines that reach all the way across the circle, crossing the middle point. The definition of a chord is a line segment that stretches across a circle intersecting at two points that does not cross the middle point. Chords are not diameters, for the property that makes a line segment a diameter is the intersection with the middle point. If the line segment is a diameter, then it automatically means that it is not a chord, for in essence, they are opposite.
