Answer: ↓↓↓
Step-by-step explanation:
1. a = ? b = 16 c = 18
a² + b² = c²
a² + (16)² = (18)²
a² + 256 = 324
- 256 -256
a² = 68
√a² = √68
a ≈ 8.25
2. a = 4 b = 8 c = ?
(4)² + (8)² = c²
16 + 64 = c²
80 = c²
√c² = √80
c ≈ 8.94
