7,926 miles, for Earth, 8 letters
7,926 miles, for the earth, 8 letters
Circumference over pi, 8 letters
Geometric measurement, 8 letters
Line through the center, 8 letters
Line through the middle, 8 letters
Longest possible chord, 8 letters
Thickness, as of a tree, 8 letters
Trans-central chord, 8 letters