C. PR = 7 cm
1) Similarity of Triangles
When two triangles are similar we can state a proportionality, between their corresponding sides.
Hence, we write for PR
[tex]\frac{10}{5}=\frac{14}{x}[/tex]
Then we can cross multiply
10x = 14 x 5
10x =70
x= 7
PR = 7 cm
Note that the PQR triangle is twice smaller than the bigger one
So
