  The bipartite entanglement is rigorously examined in the spin-$1/2$
Ising-Heisenberg planar lattice composed of identical inter-connected
bipyramidal plaquettes at zero and finite temperatures using the quantity
called concurrence. It is shown that the Heisenberg spins of the same plaquette
are twice stronger entangled in the two-fold degenerate quantum ground state
than in the macroscopically degenerate quantum chiral one. The bipartite
entanglement with chiral features completely disappears below or exactly at the
critical temperature of the model, while that with no chirality may survive
even above the critical temperature of the model. Non-monotonous temperature
variations of the concurrence clearly evidence the activation of the entangled
Heisenberg states also above classical ground state as well as their
re-appearance above the critical temperature of the model.
