1 answer:
Answer:
AB = 13.964 cm
Step-by-step explanation:
BF² = 6² + 13²
BF² = 36 + 169
BF² = 205
AB² = AF² - BF²
AB² = 20² - 205
AB² = 400 - 205 = 195
AB = 13.964 cm
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