# equilateral triangle

# Springfield Renaissance Geometry 2016-17 Lesson 15

##### DO NOW

Ashley and Tori are arguing about what kind of transformation is occurring above. Ashley claims that there is a reflection over line AB and then another reflection over CD. Tori claims that there is simply one rotation.[br][br]Who is correct? If Tori is correct then where is the center of rotation?

##### Lines of Symmetry

Is there a line of symmetry in the figure above? If there is, draw it. What relationship does the line have with the figure (beyond being a line of symmetry?)

Which of the following figures have multiple lines of symmetry?

##### Finding the circumcenter

Find the perpendicular bisector of two of the three sides of the triangle above. The intersection point is known as the circumcenter