What is the length of PR?

Given in the image we see that two angles of ∆XYZ and ∆PQR are equal respectively ie 40° and 110°. Thus their third angle would also be equal.

Hence, ∆XYZ and ∆PQR are similar by AAA condition.

Now, since corresponding sides are in proportion, we can say that~

Therefore, length of PR is 9 units.

Hope this helps :)

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

ok thats very interesting