Answer:
I fell like guiding you would be better.
First, help yourself by labelling all vertex's (there should be 5 so a,b,c,d,e).
You know that they are 2 sets of similar triangles cuz there is a 70 degree on in both and a common on
Then all you need to do is set up the proportion.
I can't give you the answer cuz I don't have much time, but I feel like you can figure it out. If this helped you, pls rate it decent, but if not just 1-star it I don’t care