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In Exercises 1-6 you are given a diagram that is marked with given information. Give the reason for each key step of the proof.

Prove: ∠G≅∠T

Key steps of proof:

a.ΔRAJ≅ΔNAK

b.RJ¯≅NK¯

c.ΔGRJ≅ΔTNK

d.∠G≅∠T

Short Answer

Expert verified

a.ΔRAJ≅ΔNAK

AAS postulate

b.RJ¯≅NK¯

Corr. parts of≅Δ are ≅.

c.ΔGRJ≅ΔTNK

SAS postulate

d.∠G≅∠T

Corr. parts of≅Δare ≅.

Step by step solution

01

Step 1. Apply AAS postulate.

Consider ΔRAJand ΔNAKin which RA¯≅NA¯,∠RAJ≅∠NAKand∠RJA≅∠NKAthen by AAS postulate width="107">ΔRAJ≅ΔNAK.

02

Step 2. Description of step.

As ΔRAJ≅ΔNAK, by corresponding parts of congruent triangles, width="63">RJ¯≅NK¯.

03

Step 3. Apply SAS postulate.

ConsiderΔGRJandΔTNKin whichGJ¯≅TK¯,∠GJR≅∠TKNandRJ¯≅NK¯then by SAS postulate width="107">ΔGRJ≅ΔTNK.

04

Step 4. Description of step.

As ΔGRJ≅ΔTNK, by corresponding parts of congruent triangles, ∠G≅∠T.

05

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

a.ΔRAJ≅ΔNAK

AAS postulate

b.RJ¯≅NK¯

Corr. parts of≅Δ are ≅.

c.ΔGRJ≅ΔTNK

SAS postulate

d.∠G≅∠T

Corr. parts of≅Δ are ≅.

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