Answer:
all work is shown and pictured
17. Yes!! SAS theorem
18. Yes !! SSS theorem
19. Yes !! SSS theorem
20. I don’t think so
Answer:

Step-by-step explanation:
Subtract 13 from 17 to get the length of the base. Then add the 1, 1, and 3 together to get the height. Then you use the area formula for a triangle.
You are right. Transitivity means, that:
if a = b and b = c, then a = c
(here a = x, b=5 and c = y).