  Jets are produced in early stages of heavy-ion collisions and undergo
modified showering in the quark-gluon plasma (QGP) medium relative to a vacuum
case. These modifications can be measured using observables like jet momentum
profile and generalized angularities to study the details of jet-medium
interactions. Jet momentum profile ($\rho(r)$) encodes radially differential
information about jet broadening and has shown migration of charged energy
towards the jet periphery in Pb+Pb collisions at the LHC. Measurements of
generalized angularities (girth $g$ and momentum dispersion $p_T^D$) and LeSub
(difference between leading and subleading constituents) from Pb+Pb collisions
at the LHC show harder, or more quark-like jet fragmentation, in the presence
of the medium. Measuring these distributions in heavy-ion collisions at RHIC
will help us further characterize the jet-medium interactions in a phase-space
region complimentary to that of the LHC. In this contribution, we present the
first measurements of fully corrected $g$, $p_T^D$ and LeSub observables using
hard-core jets in Au+Au collisions at $\sqrt{s_{\rm NN}}=200$ GeV, collected by
the STAR experiment at RHIC.
