Question

Triangle Proportions pls help find ? ive been trying for 20 mins

Answer 1

Let missing side be x

`\\ \sf\longmapsto (2)/(5)=(x)/(10)`

Now

`\\ \sf\longmapsto 5x=20`

`\\ \sf\longmapsto x=(20)/(5)`

`\\ \sf\longmapsto x=4`