Is this a right angle? Mostly checking

Are these numbers able to be a right angle?

They say c^2= A^2+b^2 But when I got by the formula it makes no sense to me. They also say it goes by a 3, 4, 5, ratio? Can someone help me with these?

7, 24, 25.

15, 30, 34.

16,28, 32.

18, 24, 30. ( I think this could be )

15, 36, 39.

5, 7, Sqr root 74.

4, 5, 6 ( Yes )

10, 11, Sqr root 221.

Take the two shorter legs...
7^2 + 24^2 = 49 + 576 = 625 = 25^2 so yes

15^2 + 30^2 = 225 + 900 = 1125
34^2 = 1746 so no

16^2 + 28^2 = 256 + 784 =1040
32^2 = 1024 so no

18^2 + 24^2 = 324 + 576 = 900 = 30^2 so yes
note: 18 = 3 * 6, 24 = 4 * 6 and 30 = 5*6 so this is related to the 3-4-5 kind of triangle

15^2 + 36^2 = 225 + 1296 = 1521
39^2 = 1521
so yes
Note: another easy to remember triangle is 5, 12 13
15 = 3*5; 36 = 3*12; 39 = 3*13

25 + 49 = 74 so yes

4^2 + 5^2 = 16 + 25 = 41
6^2 = 36
so no

10^2 + 11^2 = 100 + 121 = 221 so yes

Yes,no,no,yes,yes, yes, no, yes. The formula means that the longest side squared equals the 1st leg squared + the second leg squared. By legs I mean the other 2 sides.

You are looking to get a pythagorean tripple

if a, b and c are the numbers and c is the biggest number, then a^2 + b^2 = c^2

1. yes
2. no
3. no
4. yes
5. yes
6. yes
7. actually no....
8. yes