if rt triangle ABC right angled at b ac=13,bc=12 find ab
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Answer:
in triangle ABC, right angled at B,
AC = 13
BC = 12
AB = ?
using Pythagoras theorem:
AC² = AB² + BC²
13 = AB² + 12
169 = AB² + 144
169 - 144 = AB²
25 = AB²
√25 = AB
AB = 5
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