In the straightedge and compass construction of the equilateral triangle below, which of the following reasons can you use to prove that ∠1 ≅ ∠2? Select all that apply.
a. Angle-Side-Angle (ASA)
b. Angle-Angle-Side (AAS)
c. Side-Angle-Side (SAS)
d. Side-Side-Side (SSS)
