Answer:
The answer is B
Step-by-step explanation:
Answer:
√841
Step-by-step explanation:
You would use pythagorean theorem to solve this problem:
a² + b² = c²
a = 20 b = 21
20² + 21² = 400 + 441 = 841
√841
Answer+Step-by-step explanation:
Answer:
11
Step-by-step explanation: