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Right triangle: Find AB if BC=3, BD=5, and AD=7
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Jan 6, 2017
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Right triangle: Find AB if BC=3, BD=5, and AD=7
Mathematics
high-school
Neile
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DC² = 5² - 3² By Pythagoras' Theorem
DC² = 25 -9 =16
DC = √16 = 4
AC = AD + DC = AD + CD = 7 + 4 = 11
AB² = BC² + AC²
AB² = 3² + 11² = 9 + 121 = 130
AB² = 130
AB = √130
AB ≈ 11.402
ElPastor
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Jan 8, 2017
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Roughly 11. :') Tell me if you need me to explain how I got that number, I'll gladly elaborate.
Ingry
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Jan 12, 2017
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