3. Developing Proof Complete tho proof by filling in the blanks. K Given: HIJ ZKI AJH LIJK Prove: AHIJ AKIJ H Proof: HIJ ZKIJ and ZIJH a LIJK are given. = J by ?- So, AHIJ AKIJ by_?.

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
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### Developing Proof

Complete the proof by filling in the blanks.

**Given:**

\(\angle H IJ \cong \angle K I\)

\(\angle J H \cong \angle I J K\)

**Prove:**

\(\Delta H IJ \cong \Delta K IJ\)

**Proof:**

\(\angle H IJ \cong \angle K IJ\) and \(\angle J H \cong \angle I J K\) are given.

\(IJ = IJ\)  by _(1)_.

So, \(\Delta H IJ \cong \Delta K IJ\) by _(2)_.

**Key:**
1. Reflexive property of equality.
2. ASA postulate (Angle-Side-Angle).

**Diagram:**

The diagram accompanying the proof shows two triangles, \(\Delta HIJ\) and \(\Delta KIJ\), sharing a common side \(IJ\). The angles \(\angle HIJ\) and \(\angle KIJ\) are marked as congruent, as well as the angles \(\angle JH\) and \(\angle IJK\).

1. **\(\angle HIJ \cong \angle KIJ\):** This specifies that the angles \(HIJ\) and \(KIJ\) are congruent.
2. **\(\angle JH \cong \angle IJK\):** This specifies that the angles \(JH\) and \(IJK\) are congruent.
3. **\(IJ = IJ\) by the Reflexive property:** Indicates that the shared side \(IJ\) is equal to itself by the Reflexive property of equality.

By using these points, the proof concludes that \(\Delta HIJ \cong \Delta KIJ\) by the ASA (Angle-Side-Angle) postulate, a method of proving the congruence of triangles.
Transcribed Image Text:### Developing Proof Complete the proof by filling in the blanks. **Given:** \(\angle H IJ \cong \angle K I\) \(\angle J H \cong \angle I J K\) **Prove:** \(\Delta H IJ \cong \Delta K IJ\) **Proof:** \(\angle H IJ \cong \angle K IJ\) and \(\angle J H \cong \angle I J K\) are given. \(IJ = IJ\) by _(1)_. So, \(\Delta H IJ \cong \Delta K IJ\) by _(2)_. **Key:** 1. Reflexive property of equality. 2. ASA postulate (Angle-Side-Angle). **Diagram:** The diagram accompanying the proof shows two triangles, \(\Delta HIJ\) and \(\Delta KIJ\), sharing a common side \(IJ\). The angles \(\angle HIJ\) and \(\angle KIJ\) are marked as congruent, as well as the angles \(\angle JH\) and \(\angle IJK\). 1. **\(\angle HIJ \cong \angle KIJ\):** This specifies that the angles \(HIJ\) and \(KIJ\) are congruent. 2. **\(\angle JH \cong \angle IJK\):** This specifies that the angles \(JH\) and \(IJK\) are congruent. 3. **\(IJ = IJ\) by the Reflexive property:** Indicates that the shared side \(IJ\) is equal to itself by the Reflexive property of equality. By using these points, the proof concludes that \(\Delta HIJ \cong \Delta KIJ\) by the ASA (Angle-Side-Angle) postulate, a method of proving the congruence of triangles.
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