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Baind\newlineMath 11\newlineUpdated: \newline3/12/243/12/24\newline7.77.7 Assigned Practice\newlineName\newlineMattha-Burleigperiod 55\newlineMark the information in the diagram and then complete the flowchart proof.\newline1.1.\newlineGiven: \newlineABCB\overline{AB} \cong \overline{CB} and \newlineDADC\overline{DA} \cong \overline{DC}\newlineProve: \newlineBADBCD\angle BAD \cong \angle BCD\newlineList the three congruencies from the given statement or the diagram:\newlineList Remaining Congruent Parts:\newlinebecause...\newlineTherefore...\newline(What you wanted to prove)

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Q. Baind\newlineMath 11\newlineUpdated: \newline3/12/243/12/24\newline7.77.7 Assigned Practice\newlineName\newlineMattha-Burleigperiod 55\newlineMark the information in the diagram and then complete the flowchart proof.\newline1.1.\newlineGiven: \newlineABCB\overline{AB} \cong \overline{CB} and \newlineDADC\overline{DA} \cong \overline{DC}\newlineProve: \newlineBADBCD\angle BAD \cong \angle BCD\newlineList the three congruencies from the given statement or the diagram:\newlineList Remaining Congruent Parts:\newlinebecause...\newlineTherefore...\newline(What you wanted to prove)
  1. Given: Given: \newlineABCB\overline{AB} \cong \overline{CB} and \newlineDADC\overline{DA} \cong \overline{DC}\newlineTo prove: \newlineBADBCD\angle BAD \cong \angle BCD\newlineList the three congruencies from the given statement or the diagram:\newline11. ABCB\overline{AB} \cong \overline{CB} (Given)\newline22. DADC\overline{DA} \cong \overline{DC} (Given)
  2. List Congruent Parts: List Remaining Congruent Parts:\newlineWe need to identify any other congruent parts that are not explicitly given but can be inferred from the diagram or the properties of geometric figures.\newlineIf ABCB\overline{AB} \cong \overline{CB}, then by definition of a midpoint, point BB is the midpoint of ACAC, which implies ABBC\overline{AB} \cong \overline{BC}.
  3. Inferred Congruent Parts: because... We can use the fact that if two sides of a triangle are congruent, then the angles opposite those sides are also congruent (Isosceles Triangle Theorem). In triangle ABDABD and triangle CBDCBD: ABCB\overline{AB} \cong \overline{CB} (Given) DADC\overline{DA} \cong \overline{DC} (Given) BDBD\overline{BD} \cong \overline{BD} (Common side)
  4. Conclusion: Therefore...\newlineBy Side-Side-Side (SSS) congruence postulate, triangle ABDtriangleCBDABD \cong triangle CBD.
  5. Conclusion: Therefore... By Side-Side-Side (SSS) congruence postulate, triangle ABDtriangleCBDABD \cong triangle CBD. (What you wanted to prove) Since the triangles are congruent, their corresponding parts are congruent as well. Therefore, BADBCD\angle BAD \cong \angle BCD.

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