please someone help me with these questions. will give you brainliest.
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1. a = 10 b = ? c = 24
10² + b² = 24²
100 + b² = 576
b² = 476
b ≅ 21.8
2. a = 3 b = ? c = 5
b = 4 because of the 3 4 5 triangle rule
3. a = 9 b = ? c = 12
81 + b² = 144
b² = 63
b ≅ 7.9