anonymous
  • anonymous
The architect's side view drawing of a saltbox-style house shows a post that supports the roof ridge. The support posts is 10 ft tall. How far from the front of the house is the support post positioned? This is a triangle and this is the way or sample on how to do it: Corallary 2=x ab/ac= ac/ad Corollary 1=y ad/cd= cd/db I was trying this to do the corollary 2: factor x/25 = 25/25x
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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dumbcow
  • dumbcow
how tall is the front of the house?
anonymous
  • anonymous
what i know is that the A to C is 25 ft
anonymous
  • anonymous
that is the base of the house

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dumbcow
  • dumbcow
|dw:1327657181669:dw|
anonymous
  • anonymous
how you write in the computer so i can do the drawing too so you can see it?
dumbcow
  • dumbcow
below the textbox there is a "draw" button
anonymous
  • anonymous
: )
dumbcow
  • dumbcow
to solve for x, we need either the angle the roof slopes or the length of the roof overhang
anonymous
  • anonymous
|dw:1327657374136:dw|
anonymous
  • anonymous
that help????
dumbcow
  • dumbcow
yes :)
dumbcow
  • dumbcow
where is front of house, A or C ?
anonymous
  • anonymous
c
dumbcow
  • dumbcow
|dw:1327657781695:dw| set up proportion using corresponding sides x/10 = 10/(25-x)
anonymous
  • anonymous
is that all the answer, ok thanks
dumbcow
  • dumbcow
well the goal is to solve for x....cross-multiply...set equal to 0
anonymous
  • anonymous
the point is that i am supposed to use the formular corollary1 and 2 to get the answer
dumbcow
  • dumbcow
we are assuming triangle ABC is a right triangle ?
anonymous
  • anonymous
yes
dumbcow
  • dumbcow
i used the corollary when setting up the proportion
anonymous
  • anonymous
I think i made a mistake it should be like this |dw:1327658765372:dw|
dumbcow
  • dumbcow
|dw:1327658850698:dw| congruent sides are always opposite congruent angles put a's together and b's together x/10 = 10/(25-x)
dumbcow
  • dumbcow
oops i meant corresponding sides not congruent
anonymous
  • anonymous
yes that is exactly how i am doing ok could you continue please
dumbcow
  • dumbcow
x(25-x) = 100 25x -x^2 = 100 x^2 - 25x +100 = 0 (x-20)(x-5) = 0 x= 20 or 5 x must be larger than 25-x according to diagram x = 20
anonymous
  • anonymous
then i think should be x2
anonymous
  • anonymous
x should be from a to c
dumbcow
  • dumbcow
correct
dumbcow
  • dumbcow
oh that was from your 1st picture
anonymous
  • anonymous
yeap
anonymous
  • anonymous
so your answer is no correct?
dumbcow
  • dumbcow
haha i'm not sure, so they want the length AC from your last pic?
anonymous
  • anonymous
the x is a to c
anonymous
  • anonymous
yes
dumbcow
  • dumbcow
no the x i solved for was AD in first one, BD in 2nd one
anonymous
  • anonymous
and a to d
anonymous
  • anonymous
let me see
dumbcow
  • dumbcow
|dw:1327659555813:dw|
dumbcow
  • dumbcow
just use Pythagorean theorem to get AC
anonymous
  • anonymous
that is french haha
dumbcow
  • dumbcow
no i think he was Greek. :) right triangles....a^2 +b^2 = c^2
anonymous
  • anonymous
ok I have to go I really appreciate your help and patience : ) and of course the answer
dumbcow
  • dumbcow
AC = 5sqrt(5)

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