1. ## Similar Triangles

In this problem I have to find an estimate for distance d , I just wonder if my work is even close to being right. The given numbers etc are shown in black, and my work is shown in Red

2. if those are similar triangles (which they are), then you can pick any two sides and their lengths will be in the same ratio, ie:

$\frac{52}{12} = \frac{d}{9}$

You already wrote this in red on your diagram. it gives d=39.

3. I order to find D you will need to divide 52 by 12 to get the ratio of the lengths of the triangle and then multiply this number by 9. i.e. the answer is 39ft.

Hope this helps

4. Originally Posted by SpringFan25
if those are similar triangles (which they are), then you can pick any two sides and their lengths will be in the same ratio, ie:

$\frac{52}{12} = \frac{d}{9}$

You already wrote this in red on your diagram. it gives d=39.
Originally Posted by medicalstats
I order to find D you will need to divide 52 by 12 to get the ratio of the lengths of the triangle and then multiply this number by 9. i.e. the answer is 39ft.

Hope this helps
Ok got it all you do is 52/12 =4.333333333333 son on and all I have to do is multiply this times 9 and it does equal 39