Assessment Geometry Unit 1: Constructions, Proofs, and Rigid Motion 2. Below are the steps to constructing an equilateral triangle, given one line segment. 0 Measure the line segment E 0 Make an arc the same length as the line segment from one end point of the line segment. Repeat for the other endpoint. 0 Label the intersection point of the two arcs as point C. 0 Connect points A and C, and points B and C with a straight edge. Part A: Construct the equilateral triangle, given line segment AB. Part B: Describe how you know the triangle you have constructed is an equilateral triangle, using the construction directions as evidence. Except as otherwise noted, 2015-2021 Fishtank Learning, Inc, and licensed under CC BY-NC-SA 4.0