## Chapter 9, Lesson 3

**9-3.A** classify triangles by the number of congruent sides** Replace each __?__ with equilateral, scalene, or isosceles.** A triangle with exactly two congruent sides is called __?__ .

a.

**b.**A triangle with no congruent sides is called __?__ .

**9-3.B** recognize patterns** Look at this pattern:** ANGLEANGLEANGLE...**If this pattern continues, what letter will be in the 57th place?**