Answer:
B. 3, 4, 5
Explanation:
We solve this using the Pythagorean theorem: a² + b² = c²
Triangle A: 10, 12, 15
10² + 12² = 15²
100 + 144 = 225
244 ≠ 225 ❌
NOT A RIGHT TRIANGLE! ❌
Triangle B: 3, 4, 5
3² + 4² = 5²
9 + 16 = 25
25 = 25 ✅
RIGHT TRIANGLE ✅
Triangle C: 7, 8, 9
7² + 8² = 9²
49 + 64 = 81
113 ≠ 81 ❌
NOT A RIGHT TRIANGLE! ❌
Triangle D: 5, 12, 16
5² + 12² = 16²
25 + 144 = 256
169 ≠ 256 ❌
NOT A RIGHT TRIANGLE! ❌
I'm always happy to help :)