What information would verify that LMNO is an isosceles trapezoid? Check all that apply.

With the vertices named in order, LM and ON are the bases, so LO and MN are the legs. An isosceles trapezoid has congruent legs, making C correct; its diagonals LN and MO are also congruent, making A correct. The base angles at L and M are congruent, so E is correct. B compares the bases, and D compares opposite angles; neither is a defining test for an isosceles trapezoid.

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