Question

25. For each pair of quantities given below, check whether the first is
proportional to the second. For proportional quantities, calculate the
constant of proportionality.
a) Perimeter and radius of circles
b) Area and radius of circles​

Answer 1

a)2π , b)πr

Step-by-step explanation:

a) perimeter : radius = 2πr : r

= 2π : 1

= 2π

b) Area : radius = πr² : r

= πr*r : r

= πr : 1

= πr