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Posted 2 months ago

Holden tried to prove that FGHFIH\triangle F G H \cong \triangle F I H.
& Statement & Reason \\
\hline 1 & IHGH\overline{I H} \cong \overline{G H} & Given \\
2 & FHFH\overline{F H} \cong \overline{F H} & Line segments are congruent to themselves. \\
3 & FGHFIH\triangle F G H \cong \triangle F I H & Side-side congruence

What is the first error Holden made in his proof?

Choose 1 answer:
(A) Holden used an invalid reason to justify the congruence of a pair of sides or angles.
(B) Holden only established some of the necessary conditions for a congruence criterion.
(c) Holden established all necessary conditions, but then used an inappropriate congruence criterion.
(D) Holden used a criterion that does not guarantee congruence.
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Answer from Sia
Posted 2 months ago
Solution by Steps
step 2
The first statement is that IHGH\overline{IH} \cong \overline{GH}, with the reason given as "Given". This is a valid statement and reason
step 3
The second statement is that FHFH\overline{FH} \cong \overline{FH}, with the reason "Line segments are congruent to themselves". This is also a valid statement and reason
step 4
The third statement claims that FGHFIH\triangle FGH \cong \triangle FIH based on "Side-side congruence". However, there is no such congruence criterion as "Side-side congruence". The correct criteria are Side-Side-Side (SSS), Side-Angle-Side (SAS), Angle-Side-Angle (ASA), Angle-Angle-Side (AAS), and Hypotenuse-Leg (HL) for right triangles
step 5
Since Holden has only shown two sides to be congruent and has not established the congruence of the third side or any angles, he has not satisfied any of the valid congruence criteria
1 Answer
Key Concept
Triangle Congruence Criteria
To prove two triangles congruent, one must satisfy one of the valid congruence criteria: SSS, SAS, ASA, AAS, or HL for right triangles. "Side-side congruence" is not a recognized criterion.

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