Do these mean the same?
The hyperbolic case is similar , given to the area of a disk of the intrinsic radius '' R '' in the ( constant curvature formula 83 ) hyperbolic level by
The hyperbolic case is similar , with the area of a disk of hyperbolic radius '' R '' in the ( intrinsic curvature formula _ 83 ) constant plane given by

a). no
b). yes
a).