5.3 medians and altitude of a trianglemsengbrecht.weebly.com/uploads/1/7/5/7/17574061/5.3... ·...

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5.3 Medians and Altitude of a Triangle 1 November 16, 2015 Warm Up HW Questions? On the top of your paper (by your name) rate yourself for this section: 4 I can summarize the concepts and explain it to others 3 I can apply the concept to answer questions correctly 2 I can apply the concepts but with some mistakes 1 I need help and know how to apply the concept 0 I can't apply the concept, even with help *Rating of 02 is a warning signal to me that you need help* 5.3 Medians and Altitudes of a Triangle Goals: Use properties of medians of a triangle. Use properties of altitudes of a triangle. EQ: How would you describe the centroid and orthocenter?

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Page 1: 5.3 Medians and Altitude of a Trianglemsengbrecht.weebly.com/uploads/1/7/5/7/17574061/5.3... · 2018. 10. 15. · 5.3 Medians and Altitude of a Triangle 3 November 16, 2015 Try It

5.3 Medians and Altitude of a Triangle

1

November 16, 2015

Warm Up HW Questions?

On the top of your paper (by your name) rate yourself for this section:

4 ­ I can summarize the concepts and explain it to others

3 ­ I can apply the concept to answer questions correctly

2 ­ I can apply the concepts but with some mistakes

1 ­ I need help and know how to apply the concept

0 ­ I can't apply the concept, even with help

*Rating of 0­2 is a warning signal to me that you need help*

5.3 Medians and Altitudes of a Triangle

Goals: • Use properties of medians of a triangle.• Use properties of altitudes of a triangle.

EQ: How would you describe the centroid and orthocenter?

Page 2: 5.3 Medians and Altitude of a Trianglemsengbrecht.weebly.com/uploads/1/7/5/7/17574061/5.3... · 2018. 10. 15. · 5.3 Medians and Altitude of a Triangle 3 November 16, 2015 Try It

5.3 Medians and Altitude of a Triangle

2

November 16, 2015

Vocabulary

Median of a triangle:

Centroid of a triangle:

midpt of one side to opposite vertex

pt of concurrency of medians

Example 1: Using the Centroid of a TriangleR is the centroid of     STU and SR = 16. Find SV and RV.

Example 2: Finding the Centroid of a TriangleFind the coordinates of centroid C of     DEF.

Try ItR is the centroid of     STU and RV = 7. Find SR and SV.

Page 3: 5.3 Medians and Altitude of a Trianglemsengbrecht.weebly.com/uploads/1/7/5/7/17574061/5.3... · 2018. 10. 15. · 5.3 Medians and Altitude of a Triangle 3 November 16, 2015 Try It

5.3 Medians and Altitude of a Triangle

3

November 16, 2015

Try ItFind the coordinates for the centroid for     JKL.

J(7, 10), K(5, 2), L(3, 6)

VocabularyAltitude of a triangle:segment      to opposite side passing through vertex

Orthocenter of a triangle:pt of concurrency of the altitudes

Example 3: Drawing Altitudes and OrthocentersWhere is the Orthocenter located for each of the triangles?

Try It

SummaryEQ: How would you describe the 

centroid and orthocenter?

5.3 Homeworkp.282  #8­12, 17­22, 39­45

Page 4: 5.3 Medians and Altitude of a Trianglemsengbrecht.weebly.com/uploads/1/7/5/7/17574061/5.3... · 2018. 10. 15. · 5.3 Medians and Altitude of a Triangle 3 November 16, 2015 Try It

5.3 Medians and Altitude of a Triangle

4

November 16, 2015

Notecard