2pi sq cm
Twice as big.
A circle with a radius of 21 cm has an area of ~1,385.44 square cm
A cylinder whose radius is 6cm and height is 20cm has a lateral area of approximately 753.98cm2
The area of a circle with radius r is pi*r*r where pi = 3.1416 approx. When r = 6 cm, the area is 113.1 sq cm.
2pi sq cm
Twice as big.
A circle with a radius of 21 cm has an area of ~1,385.44 square cm
A cylinder whose radius is 6cm and height is 20cm has a lateral area of approximately 753.98cm2
The radius of a circle whose area is 3.14 square centimeters is: 1 cm
8*pi + 16 = 41.13 cm (approx)It depends on whether 8 cm is the radius or diameter of the semicircle.
It is half of a circle; the circle's radius (and that of the semicircle) is 10 cm.
The area of a circle with radius r is pi*r*r where pi = 3.1416 approx. When r = 6 cm, the area is 113.1 sq cm.
Perimeter = (pi*280)+560 = 1439.645943 cm
Area = pi*r2 = 651.44 cm2
Using 3.14 as Pi the area of circle is: 28.259999999999998
The lateral area of a cylinder whose diameter is 4cm and whose height is three times the radius equals approximately 75.4cm2