Answer:
Step-by-step explanation:
Midsegment is the half the length of the parallel side of the triangle.
So parallel sides of the triangles, which are the side of the base of the pyramid are:
Answer:

Step-by-step explanation:

Hope this helps!
Answer:
Step-by-step explanation:
D
I think isn't anyone of these alternatives because if we put number 15 in the place of y it is x-y=30. X-15=30
X=30+15=45.
X=45