Similar triangles

[MarkSA]

Hello,

I have this problem (and the answer)... but I can't figure out how the answer is being arrived at. Can you walk me through it?

Thanks.

 

[stapel]

Use the fact that the triangles are similar to label the appropriate angle in the larger triangle with "theta". Then take the appropriate trig ratio. Solve the ratio for "D=". :wink:

Eliz.

 

[MarkSA]

Oh! That was easier than I thought. Thanks