Answer:x=26
Step-by-step explanation:
Answer:
Part a) The triangles KJL and NMP are similar by AAA similarity postulate
Part b) The value of x is 
Step-by-step explanation:
Part a)
we know that
The AAA similarity postulate states that If in two triangles the corresponding angles are equal, then the triangles are similar
In this problem
m<JKL=m<MNP
m<KJL=m<NMP
so
The third angle must be equal (remember that the sum of the interior angles of triangle must be equal to 180 degrees)
m<JLK=m<MPN
therefore
The triangles KJL and NMP are similar by AAA similarity postulate
Part b) What is the value of x?
we know that
if two figures are similar, then the ratio of its corresponding sides are equal

Its okay, the first half is completely irrelevant. All that matters is x and y. y = 16, because y is how much space the books take up. x = 8, since x is the number of books. All you have to find is the proportions. It is most likely talking about the proportions of the books, so you would need to find the length if each book. You know they will all be the same because it was previously mentioned each book is the same size. So the equation is:

Since 16/8 is 2, you would get 2in/book.
Hope that helps!