A) the missing degree is 166
b) the missing degree is 142
c)the missing degree is 160
I do hope I helped you in a way! If I am incorrect I apologize.
Answer:
EFD
Step-by-step explanation:
Just follow the marks on the triangle.
There is a mistake 9,12,13 is not a right triangle. but 9,12,15 is. IF you use this triangle instead, then the area of the 13,14,15 triangle is the sum of the area of the other two triangles.
It would be: 567/18 = 31.5
So, she needs atleast 32 shelves....
