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Find the rise ofBD? :confused: :(

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- Dec 3rd 2006, 05:33 AMzak_killcity14@hotmail.coRoof Structure Question find lengths
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Find the rise of*BD*? :confused: :( - Dec 3rd 2006, 05:59 AMThePerfectHacker
I give you a hint.

The area of Triangle ABD = area ABC +area BCD

Now, call , the height.

Then you can find,

Thus,

area ABD=

area ABC can be computed by Heron's Formula

area BCD=

You have an equation to solve for! - Dec 3rd 2006, 06:03 AMSoroban
Hello, Zak!

In , use the Law of Cosines to find

Hence: .

Then: .

In right triangle

Therefore: .

- Dec 3rd 2006, 05:58 PMSoroban
Hello, Zak!

An alternate approach . . .

In , use the Law of Cosines to find angle

. . Hence: .

In right triangle

. . Therefore: .