Another name for a square corner is Vertex
Answer: what was the original price?
Step-by-step explanation:
2.

(this is given in the first sentence)
3.

and

due to ...
7. ... the alternate interior angles theorem (which holds because

and

are parallel)
8. Because the above establishes that

, which means

, which in turn means

is a parallelogram.
Answer:
80
Step-by-step explanation:
To have 16 more pages means he has 20% more of the book to cover if he has already covered 80%
Let the number of pages in the book be X
20% of X = 16
20/ 100. * X = 16
1/ 5 * X = 16 >>> X = 16 * 5 = 80 pages.