A segment joining any two points of the circle.
- secant of a circle - sieczna okręgu
- kąt "cięciwa-cięciwa" - chord-chord angle, also c-c angle [czytaj: sisi engl]
an angle formed by two chords that intersect inside or on the boundary of a circle
- kąt dopisany - tangent-chord angle, also t-c angle [czytaj: tisi engl]
an angle formed by a tangent to a circle and a chord from the point of tangency
- średnica - diameter [da'jamita]
a chord that passes throuhg the centre of a circle; the longest chord of a circle