### Home > GC > Chapter 9 > Lesson 9.1.3 > Problem 9-31

9-31.

What do the markings on the figures mean?

What other parts do these triangles have in common?

Yes, they are congruent. What is the reason?

9-31.

What do the markings on the figures mean?

What other parts do these triangles have in common?

Yes, they are congruent. What is the reason?