Assertion: ellipsoid | /r/HasProperty | defined with radii
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Source sentences:
text: An ellipsoid is triaxial, with the polar Z-axis represented by the conjugate radius, $ b $ , while the two equatorial axes perpendicular to each other, X and Y, are defined with radii $ a_x,a_y $ , respectively (conventionally, $ a_x,a_y,b $ are denoted as $ a,b,c $ , but in most cases——such as Earth——