Answer:
Use Pythagorean:
#1
- x² = 16² - 8²
- x² = 192
- x = √192
- x = 12.73, not an integer
Not a Pythagorean triple
#2
- x² = 40² + 9²
- x² = 1681
- x = √1681
- x = 41
It is a Pythagorean triple (9, 40, 41)
#3
- x² = 6² + 13²
- x² = 205
- x = √205
- x = 14.32, not an integer
Not a Pythagorean triple
