IM G 1.4 Cool Down
Construct an equilateral triangle.
How do you know it is equilateral?
IM G Unit 1 Lesson 4 from IM Geometry by Illustrative Mathematics, https://im.kendallhunt.com/HS/students/2/1/4/index.html. Licensed under the Creative Commons Attribution 4.0 license, https://creativecommons.org/licenses/by/4.0/.