The angles diagonally opposite each other are congruent while those adjacent to each other add up to 180 degrees. You can get eight congruent angles with a transversal if the two lines are parallel, because each angle would be 90.
For downstairs- 28 x 38= 1064
For upstairs- 26 x 14= 364
All together- 1064 + 364= 1428
So.... 1428 seats in total.
Hope this helped! :)

try that then times it by 12.1
Answer:
20 is x ≥ 25
Step-by-step explanation:
In number 20 you put x is less than or equal to 25 ( x ≤ 25 )
It should be x is greater than or equal to 25 ( x ≥ 25 ) because it says it cannot be less than 25.
All your other answers are correct. Good job.