In a triangle, how many vertices (vertices can be possible)?

Construct $△PQR$, in which $QR=6.5 \mathrm{cm}$, $\angle PQR=60°$ and $PQ-PR=2.5 \mathrm{cm}$

Construct $△ABC$, in which $BC=6 \mathrm{cm}$, $\angle ABC=100°$ and $AC-AB=2.5 \mathrm{cm}$.

Construct $△PQR$, in which $QR=4.2 \mathrm{cm}$, $\angle Q=40°$ and $PQ+PR=8.5 \mathrm{cm}$.

Construct$△XYZ$, in which $YZ=7.4 \mathrm{cm}$, $\angle XYZ=45°$ and $XY-XZ=2.7 \mathrm{cm}$

Construct $△XYZ$, in which $YZ=6 \mathrm{cm}$, $XY+YZ=9 \mathrm{cm}$ and $\angle Y=50°$

Construct $△XYZ$, such that $XY+XZ=10.3 \mathrm{cm}$, $YZ=4.9 \mathrm{cm},\angle XYZ=45°$.

Construct $△ABC$, in which $BC=6.2 \mathrm{cm}$, $\angle C=50°$ and $AB+AC=9.8 \mathrm{cm}$.

Construct $△PQR$, in which $PQ-PR=2.4 \mathrm{cm}$, $QR=6.4 \mathrm{cm}$ and $\angle PQR=55°$.