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Given that\([ABC] = 10,\)find \([BCD].\)

 


 Sep 27, 2020
 #1
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[BCD] = 100/3.

 Sep 27, 2020
 #2
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what do the square brackets mean?

 Sep 28, 2020
 #3
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Hey Melody! The square brackets usually represent area.

 

We know that the area of ABC is 10, so its height to AB  from C must be 20/6=10/3. This same height is the height to BD from C, so we can compute (10*10/3)/2=50/3. 

 

Guest, you were close, but I think you forgot to divide by two at the end!

 

Hope this helped!

laugh

 Sep 28, 2020
 #4
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Thanks OlympusHero,

I suppose I would have guessed that, and maybe it is a normal thing these days that I should recognize,

But it just seems to me that the word 'area' should have been used.

 

Never mind, thanks for the info and the question answer.

Melody  Sep 29, 2020

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