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Question
If ∆ABC is an isosceles triangle with ∠C = 90° and AC = 5 cm, then AB is
Options
2.5 cm
5 cm
10 cm
`5sqrt(2) "cm"`
Solution
`5sqrt(2) "cm"`
Explanation;
Hint:
AB2 = AC2 + BC2
AB2 = 52 + 52 ...(It is an isosceles triangle)
AB = `sqrt(50)`
= `sqrt(25 xx 2)`
AB = `5sqrt(2)`
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