Mathematics
Chord
In Class 9 Mathematics, this topic introduces the chord of a circle—a line segment joining any two points on its circumference. Students learn to identify and draw chords, distinguish them from the radius, diameter, arc, and secant, and understand how a diameter is the longest chord. The topic also develops understanding of chords through diagrams and circle-based reasoning, helping students apply the concept while studying the properties of circles.
Topic overviewटॉपिक का परिचय
Concept revisionअवधारणाओं का पुनरावर्तन
If two chords of a circle are equal in length, then how are their distances from the centre?
In a circle, chords of equal length are at equal perpendicular distances from the centre. A perpendicular drawn from the centre to each chord bisects that chord.
If two chords of a circle are equidistant from the centre, then which statement is correct?
A circle theorem states that chords at equal distances from the centre are equal in length. Hence, the two chords have the same length.