Answer:
Explanation:
The diameter of a circle is twice the radius. Therefore, if the diameter is 8cm, the radius is 8cm/2 = 4cm.
The area of a circle is given by the formula A = πr^2, where π is the mathematical constant pi, and r is the radius of the circle. Substituting the value of r=4cm, we get:
A = π(4cm)^2 = 16π cm^2
Therefore, the area of the circle is 16π cm^2.
The circumference of a circle is given by the formula C = 2πr. Substituting the value of r=4cm, we get:
C = 2π(4cm) = 8π cm
Therefore, the circumference of the circle is 8π cm.