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In Triangle ABC which is right angled at B. Given that AB = 9cm, AC = 15cm and D, E are the mid-points of the sides AB and AC res. Find the length of BC?
- a)12cm
- b)13.5cm
- c)13cm
- d)15cm
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
In Triangle ABC which is right angled at B. Given that AB = 9cm, AC = ...
USE the Pythagorean triplane ...
Base^2 +height^2 =hypotenuse^2..
.9^2+ x^2 = 15^2........x=12
Base^2 +height^2 =hypotenuse^2..
.9^2+ x^2 = 15^2........x=12
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Community Answer
In Triangle ABC which is right angled at B. Given that AB = 9cm, AC = ...
Use Pythagoras theorem to find it.
AB²+BC²=AC²
9²+BC²=15²
81+BC²=225
BC²=225-81=144
BC=√144= 12cm
AB²+BC²=AC²
9²+BC²=15²
81+BC²=225
BC²=225-81=144
BC=√144= 12cm
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