Per NCERT, what is the length of a QUARTER CIRCLE (arc) of radius r?
A2πr
Bπr²/4
Cπr/2
Dπr
Answer & Solution
Correct answer: C. πr/2
One-fourth of 2πr = πr/2 (per NCERT's quarter-circle derivation by rotation). The other options misstate.
Related questions
Per NCERT, what is the perimeter of a shape obtained by joining a SEMICIRCLE (diameter d) On a 400 m athletics track, why do athletes in OUTER lanes start AHEAD of athletes in innePer NCERT, what is the length of an arc of a circle of radius r that subtends an angle of Per NCERT, what is the length of a SEMICIRCLE of radius r?Per NCERT, the circumference of a circle in terms of its radius r is given by which formulPer NCERT, what is the circumference of a circle of diameter d expressed in terms of π?Per NCERT, for ANY equilateral triangle, what is the ratio of perimeter to side?Per NCERT, for ANY square (regardless of its size), what is the ratio of perimeter to side