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avatar+97 

 

Help me solve for DC

 Feb 14, 2019
 #1
avatar+12 
+1

DC= 461.33m

 

as this is a right triangle

 Feb 14, 2019
edited by soccermanward  Feb 14, 2019
 #2
avatar+28135 
+1

Angle ABD = 180 - 35 = 145º

 

Angle ADB = 180 - (145+16) = 19º

 

Using the sine rule:  BD/sin(16) = 950/sin(19) = ...

 

Then DC = BDsin(35) = ...

 

I’ll leave you to fill in the blanks.

 Feb 14, 2019
 #3
avatar+97 
0

So if im correct its 461.33m Tall.

 

2917.98 * 0.27563 = BD

 

BD = 804.303...

 

0.5735... * 804.303...=DC

 

DC= 461.33m Tall

 Feb 14, 2019
 #4
avatar+103131 
+2

Let's see StarStrike.....

 

Note that angle ABD = 180 - 35 =  145°

 

So angle ADB =   180 - 16 - 145 =  19°

 

So.....we can use the Law of Sines to find  thusly

 

AD / sin ABD = 950 / sin ADB

 

AD  / sin 145  =  950 / sin 19

 

AD =  950 * sin (145) / sin (19) ≈    1673.68

 

Now...ADC is a right triangle....so  we have that

 

sin 16   = DC / AD

 

sin 16 = DC / 1673.68

 

1673.68 * sin 16 =  DC  ≈ 461.33      and you are correct  !!!!

 

 

cool cool cool

 Feb 14, 2019

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