Triangles ABC and PQR are similar. What is the length of PQ?

PQ=10.5

Step-by-step explanation:

From thales' similarity theorem:

PQ/AB=PR/AC=QR/BC

PQ/7=18/12

PQ=7×18/12=7×3/2=21/2=10.5

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}