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Home > CCG > Chapter 2 > Lesson 2.1.1 > Problem 2-10


Camille loves guessing games. She is going to tell you a fact about her shape to see if you can guess what it is.  

  1. “My triangle has only one line of symmetry. What is it?”

  2. “My triangle has three lines of symmetry. What is it?”

  3. “My quadrilateral has no lines of symmetry but it does have rotation symmetry. What is it?”

    Think of different types of triangles.

    Examples each of equilateral, obtuse, acute, and isosceles triangles

    The equilateral triangle has 3 dashed segments, 1 from each vertex, the Isosceles triangle has 1 dashed segment from top vertex, obtuse & acute triangles have no dashed segments.

    Find the number of lines of symmetry for each type of triangle.