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avatar+569 

need help pls im not getting it right

 Feb 21, 2018
 #1
avatar+18055 
+1

4. similar triangles

so   14 is to 8   as  FM is to 9......ratio:

    14/8 = FM/9     so FM = 14/8 * 9 = 15.75 feet

Now for the other side

14/8 =HM/12     HM = 14/8 *  12 =21 feet

Total = 14 + 15.75 +21 = 50.75 ft

 

5. Use pythagoream theorem to find the diagonal       then take 1/2

   BD^2 = 8^2 + 14^2 = 260

BD= 16.125        1/2 BD = BE = 8.062 ft

 

 

6.  I THINK    40 is to 85    as   (40+48) is to (?+85)

      as a ratio:   40/85 = (40+48) / (?+85)     solve for ?

              (?+85) = (40+48) / (40/85)

               ?+85  = 187

                  ? =102

 Feb 21, 2018
edited by ElectricPavlov  Feb 21, 2018
edited by ElectricPavlov  Feb 21, 2018
 #2
avatar+99586 
+1

6)  In a triangle. a segment drawn parallel to a base always splits the sides in equal proportions

 

So we have that

 

48/ 40   = ? / 85   

 

6/ 5  =  ? / 85      cross-multiply

 

85 * 6   =  5 * ?

 

510  =  5 * ?      divide both sides by  5

 

102   =  ?

 

We  can check this

 

48 / 40  =  102 / 85

 

6 / 5  =   6/ 5

 

 

cool cool cool

 Feb 21, 2018

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