AnswersAZ-Geometry A MA201Triangle Congruence: ASA and AAS

Triangle Congruence: ASA and AAS Answers

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Can you conclude that triangle GHF is congruent to triangle GJK? Explain.

A
yes, by ASA
B
yes, by AAS
C
yes, by AAA
D
not enough information given
3

substitution property ✔ reflexive propertyaddition property subtraction property

A
substitution property
B
reflexive property
C
addition property
D
subtraction property
4

vertical angles ✔ ASAAAA the reflexive property

A
vertical angles
B
ASA
C
AAA
D
the reflexive property
5

Are the triangles congruent? If so, how do you know?

A
yes, because all the angles of the triangles are acute
B
yes, because the triangles have three congruent, corresponding angles
C
yes, because of ASA or AAS
D
not enough information given
6

✔ LNMLON LMN NLM

A
LNM
B
LON
C
LMN
D
NLM
7

Isabelle proves that the triangles are congruent by using the parallel lines to determine a second set of angles are congruent. What statement and reason could she have used?

A
∠ABC ≅ ∠BAC; corresponding angles of parallel lines are congruent.
B
∠CAB ≅ ∠DCB; alternate interior angles of parallel lines are congruent
C
∠ABC ≅ ∠DCB; alternate interior angles of parallel lines are congruent
D
∠ACD ≅ ∠ABD; corresponding angles of parallel lines are congruent.
8

Determine the rigid transformations that will map ΔABC to ΔXYZ.

A
Translate vertex B to vertex Z; reflect ΔABC across side AB.
B
Translate vertex X to vertex C; rotate ΔXYZ to align the sides and angles.
C
Reflect ΔABC across side AB; translate vertex C to vertex X.
D
Translate vertex X to vertex A; rotate ΔXYZ to align the sides and angles.
10

If two triangles have three congruent, corresponding angles, what additional information is needed to prove that the triangles are congruent?

Answer:

To prove that two triangles with three congruent, corresponding angles are congruent, you would need to have at least one set of corresponding sides that are also congruent. You could then use ASA or AAS congruence theorems or rigid transformations to prove congruence.

12

Explain how the angle-angle-side congruence theorem is an extension of the angle-side-angle congruence theorem. Be sure to discuss the information you would need for each theorem.

Answer:

The interior angle measures of a triangle add up to 180 degrees. Thus, if you are given angle-angle-side, you can solve for the third angle measure and essentially have angle-side-angle because the given side will now be the included side.

13

What did you include in your response? Check all that apply.

A
Congruent, corresponding side lengths are needed.
B
The triangles need corresponding, congruent sides to be congruent.
C
Once congruent sides are known, the ASA or AAS congruence theorems or rigid transformations can be used to prove congruence.
14

What did you include in your response? Check all that apply.

A
The interior angles sum to 180 degrees.
B
Solve for the third or unknown angle.
C
The given side becomes the included side.

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