First find the radius by dividing 23 by 2*pi which works out as 3.660563691
Surface area of the sphere = 4*pi*3.6605636912 = 168.3859298 or about 168 square mm
23mm= 0.905511811023622 inches23mm = 0.90551181of an inch
23mm= 0.905511811023622 inches23mm = 0.90551181of an inch
0.9055 in.
23mm
23mm
23 millimeters is 0.91 inches.
right
23mm is about 9/10 of an inch. That's about halfway between 7/8 and 15/16
2.3cm = 23mm
65mm x 65mm x 23mm = 97175mm³
56.3 cm
23mm (cm x 10 = mm)