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1. quadrilateral defg is a parallelogram. given 2. \\(\\overline{de} \\…

Question

  1. quadrilateral defg is a parallelogram. given
  2. \\(\overline{de} \parallel \overline{gf}\\) \\(\overline{dg} \parallel \overline{ef}\\) definition of a parallelogram
  3. draw \\(\overline{df}\\) and \\(\overline{ge}\\). these line segments are transversals cutting two pairs of parallel lines: \\(\overleftrightarrow{de}\\) and \\(\overleftrightarrow{gf}\\) and \\(\overleftrightarrow{dg}\\) and \\(\overleftrightarrow{ef}\\). drawing line segments
  4. place point h where \\(\overline{df}\\) and \\(\overline{ge}\\) intersect. defining a point
  5. \\(\angle hgd \cong \angle hef\\) \\(\angle hdg \cong \angle hfe\\)
  6. \\(\overline{dg} \cong \overline{ef}\\) opposite sides of a parallelogram are congruent.
  7. asa criterion for congruence
  8. \\(\overline{gh} \cong \overline{eh}\\) \\(\overline{dh} \cong \overline{fh}\\) corresponding sides of congruent triangles are congruent.

15
what is the missing statement for step 7 in this proof?
a. \\(\triangle dgh \cong \triangle feh\\)
b. \\(\triangle ghf \cong \triangle ehd\\)
c. \\(\triangle dgf \cong \triangle fed\\)
d. \\(\triangle def \cong \triangle edg\\)

Explanation:

Step1: Identify congruent parts

From step 5: $\angle HGD \cong \angle HEF$, $\angle HDG \cong \angle HFE$; From step 6: $\overline{DG} \cong \overline{EF}$

Step2: Match to ASA congruence

ASA requires two pairs of congruent angles and the included congruent side. The included side between the angles in $\triangle DGH$ and $\triangle FEH$ is $\overline{DG}$ and $\overline{EF}$, so the triangles are $\triangle DGH \cong \triangle FEH$.

Answer:

A. $\triangle DGH \cong \triangle FEH$