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In Exercises 1-3 you are given a diagram that is marked with given information. Give the reason for each key step of the proof.

Prove: AX¯≅AY¯

Key steps of proof:

a. ΔPAL≅ΔKAN

b. ∠L≅∠N

c. ΔLAX≅ΔNAY

d. AX¯≅AY¯

Short Answer

Expert verified

a.ΔPAL≅ΔKAN

SAS postulate

b.∠L≅∠N

Corr. parts of≅Δ are ≅.

c.ΔLAX≅ΔNAY

ASA postulate

d.AX¯≅AY¯

Corr. parts of≅Δ are ≅.

Step by step solution

01

Step 1. Apply SAS postulate.

Consider ΔPALand ΔKANin which PA¯≅KA¯,∠PAL≅∠KAN andLA¯≅NA¯ then by SAS postulate ΔPAL≅ΔKAN.

02

Step 2. Description of step.

As ΔPAL≅ΔKAN, by corresponding parts of congruent triangles, ∠L≅∠N.

03

Step 3. Apply ASA postulate.

ConsiderΔLAX andΔNAY in which LA¯≅NA¯,∠LAX≅∠NAY and∠L≅∠N then by ASA postulate ΔLAX≅ΔNAY.

04

Step 4. Description of step.

As ΔLAX≅ΔNAY, by corresponding parts of congruent triangles, AX¯≅AY¯.

05

Step 5. Give the reason for each key step of the proof.

a.ΔPAL≅ΔKAN

SAS postulate

b.∠L≅∠N

Corr. parts of≅Δ are ≅.

c.ΔLAX≅ΔNAY

ASA postulate

d.AX¯≅AY¯

Corr. parts of≅Δ are ≅.

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