Answer:
QR = 5.4
Explanation:
These pentagons are similar meaning their corresponding parts have the same scale factor.
AB to PQ = 2 to 1.8
2/1.8 = 10/9 2 ÷ 1.8 = 2 ÷ 1 8/10; 2 ÷ 18/10 ; 2 × 10/18 = 20/18 ; 10/9
AB : PQ = BC : QR
![(10)/(9) = (6)/(QR)](https://img.qammunity.org/2022/formulas/mathematics/high-school/utlafyeojhpwvqyghi5h3029akqbkhwpqh.png)
10QR = 54
QR = 54/10
QR = 5.4