please someone help me with these questions. will give you brainliest.
![please someone help me with these questions will give you brainliest class=](https://us-static.z-dn.net/files/d4f/9cc42e172c4caf31423002ec1b977a4b.png)
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