25. If the area of a circle is 144cmthen find

a. lts diameter

b. Its circumference

a. lts diameter = 13.540550005146 cm

b. Its circumference = 42.538892421732 cm

Step-by-step explanation:

suppose A the area; d the Diameter; P the circumference and r the radius

A = πr²

P = d*r = 2πr

then

r² = A/π = 144:π = 45.836623610466

then

→ r = √ (45.836623610466) = 6.770275002573

d = 6.770275002573*2 = 13.540550005146

→ P = 13,.540550005146*π = 42.538892421732