Nadia Is correct I believe, Because if a pizza is cut into 8 slices each slice is going to be smaller. but if it were to be cut into fourths it would be bigger. They are indeed equivalent but still never the same in size.
Vertices are the essentially the corners of a shape. For example, a circle has zero vertices because there are no corners. A square has four because is has four corners, etc.
Answer: 61
The explanation is shown below:
1. By definition, the consecutive angles of a parallelogram are sumplementary, which means that the sum is 180 degrees. And the opposite angles are congruent.
2. Based on this, you have:
and 
3.
and
are opposite, therefore:

So:

4. Solve for
in the equation
and substitute it into
:


5. Solve for
:

Answer:
10
Step-by-step explanation:
5-5=0
0-10=-10
-10+20=10