The Pythagorean theorem states that the square of the hypotenuse is equal to the sum of the squares of the legs:

The hypotenuse is the side with the greatest length.
Check all options:
1. c=5, a=3, b=4:
true.
2. c=14, a=4, b=11:
false.
3. c=17, a=9, b=14:
false.
4. c=16, a=8, b=14:
false.
5. c=17, a=8, b=15:
true.
Answer: correct options are A and E.
A20-a18=a1+19d-a1-17d=2d =281-97
so
d=92
12? im not sure
i think u need to multiply 6 and 2 to get your answer.
I’m sorry I can’t help ypu