bonjour
AB² = AC² - CB²
AB² = 5 ² - 3 ²
AB² = 25 - 9 = 16
AB = √16 = 4 cm
BE² = DE² - BD²
BE² = 15² - 12 ² = 81
BE = √81 = 9 cm
AE = 4 + 9 = 13 cm
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bonjour
AB² = AC² - CB²
AB² = 5 ² - 3 ²
AB² = 25 - 9 = 16
AB = √16 = 4 cm
BE² = DE² - BD²
BE² = 15² - 12 ² = 81
BE = √81 = 9 cm
AE = 4 + 9 = 13 cm