### Home > CALC > Chapter 7 > Lesson 7.1.2 > Problem 7-21

7-21.

Do you see two similar overlapping triangles? Recall that similar triangles have proportional sides. Set up a proportion and solve for *x*.

7-21.

Do you see two similar overlapping triangles? Recall that similar triangles have proportional sides. Set up a proportion and solve for *x*.