and are congruentsincethey both havea radiusof cm.and are similarwith similarityratio of.and are similarwith similarityratio of.and are similarwith similarityratio of.and are similarwith similarityratio of.and are similarwith similarityratio of.Chord,Diameter, Secant
Achordis definedas a line segmentstartingat one pointon the circleand endingat anotherpointon the
circle.
A chordthat goesthroughthe centerof the circleis calledthediameterof the circle.Noticethat the diameter
is twiceas long as the radiusof the circle.
Asecantis a line that cuts throughthe circleand continuesinfinitelyin both directions.
Pointof Tangencyand Tangent
Atangentlineis definedas a line that touchesthe circleat exactlyone point.This pointis calledthepoint
of tangency.