namjooncore namjooncore 04-06-2021 Mathematics contestada Line is intersected by line , as shown in the diagram below. Based on the diagram, which of the following equations must be true? * ∠1 + ∠2 = 180° ∠1 + ∠3 = 180° ∠2 + ∠3 = 90° ∠2 + ∠4 = 90°