Respuesta :
Yes, because they are similar(or you can call congruent), proved by SAS or simply HL.
For that to happen, they must be similar. Maybe you've heard of Thales theorem?
So, let's see how the ratio of vertical to horizontal is:
3/7 (in the first triangle)
9/21 (in the second triangle)
Is 3/7=9/21? Yup. So that it is the second one.
So, let's see how the ratio of vertical to horizontal is:
3/7 (in the first triangle)
9/21 (in the second triangle)
Is 3/7=9/21? Yup. So that it is the second one.