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Concurrent Line Notes.notebook 1 September 30, 2014 Sep 307:29 AM POD Factor: x 2 + 7x 18 Nov 46:38 PM 5.1 and 5.2 Bisectors, Medians, and Altitudes Concurrent: when 3 or more lines intersect Point of Concurrency: the point at which 3 or more lines intersect Circumcenter : pt of concurrency of the perpendicular bisectors equidistant to the vertices the center of a circle that is circumscribed about the triangle Circumscribed about: a circle that is on all 3 vertices of a triangle

Concurrent Line Notes.notebook · Concurrent Line Notes.notebook 1 September 30, 2014 Sep 307:29 AM POD Factor: x2 + 7x 18 Nov 46:38 PM 5.1 and 5.2 Bisectors, Medians, and Altitudes

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Page 1: Concurrent Line Notes.notebook · Concurrent Line Notes.notebook 1 September 30, 2014 Sep 307:29 AM POD Factor: x2 + 7x 18 Nov 46:38 PM 5.1 and 5.2 Bisectors, Medians, and Altitudes

Concurrent Line Notes.notebook

1

September 30, 2014

Sep 30­7:29 AM

POD

Factor:

x2 + 7x ­ 18

Nov 4­6:38 PM

5.1 and 5.2 Bisectors, Medians, and AltitudesConcurrent: when 3 or more lines intersectPoint of Concurrency: the point at which 3 or more lines intersect

Circumcenter : ­pt of concurrency of the perpendicular bisectors ­equidistant to the vertices­the center of a circle that is circumscribed about the triangle

Circumscribed about: a circle that is on all 3 vertices of  a triangle

Page 2: Concurrent Line Notes.notebook · Concurrent Line Notes.notebook 1 September 30, 2014 Sep 307:29 AM POD Factor: x2 + 7x 18 Nov 46:38 PM 5.1 and 5.2 Bisectors, Medians, and Altitudes

Concurrent Line Notes.notebook

2

September 30, 2014

Nov 29­7:07 AM

right

obtuseacute Perpendicular Bisectors

Dec 1­7:52 AM

B

A

C

PE

D

F

Solve for x:

1)AP=17.5       BP=x

2) CP = 5x+4    AP= 2x+10

Page 3: Concurrent Line Notes.notebook · Concurrent Line Notes.notebook 1 September 30, 2014 Sep 307:29 AM POD Factor: x2 + 7x 18 Nov 46:38 PM 5.1 and 5.2 Bisectors, Medians, and Altitudes

Concurrent Line Notes.notebook

3

September 30, 2014

Nov 29­7:07 AM

Incenter:­pt of concurrency of the angle bisectors       ­equidistant from the sides            ­the center of a circle that is inscribed in the triangle

Inscribed in: circle that is inside the triangle 

1) XI = 7   YI = x

2) ZI = 4x+2  YI = 2x+6

Solve for x:

Angle Bisectors

Nov 10­6:37 PM

Page 4: Concurrent Line Notes.notebook · Concurrent Line Notes.notebook 1 September 30, 2014 Sep 307:29 AM POD Factor: x2 + 7x 18 Nov 46:38 PM 5.1 and 5.2 Bisectors, Medians, and Altitudes

Concurrent Line Notes.notebook

4

September 30, 2014

Nov 10­6:38 PM

Nov 4­7:07 PM

Median: segment whose endpoints are a vertex and the midpoint of the opposite sideCentroid: point of concurrency of a triangles medians

Page 5: Concurrent Line Notes.notebook · Concurrent Line Notes.notebook 1 September 30, 2014 Sep 307:29 AM POD Factor: x2 + 7x 18 Nov 46:38 PM 5.1 and 5.2 Bisectors, Medians, and Altitudes

Concurrent Line Notes.notebook

5

September 30, 2014

Nov 4­7:11 PM

Altitude: a perpendicular segment from the vertex to the line containing the opposite sideOrthocenter: point of concurrency of the altitudes

Nov 4­7:33 PM

Page 6: Concurrent Line Notes.notebook · Concurrent Line Notes.notebook 1 September 30, 2014 Sep 307:29 AM POD Factor: x2 + 7x 18 Nov 46:38 PM 5.1 and 5.2 Bisectors, Medians, and Altitudes

Concurrent Line Notes.notebook

6

September 30, 2014

Nov 30­9:03 AM

Perpendicular Bisector: Circumcenter, Equadistant to Vertices

Angle Bisectors: Incenter, Equadistant to the Sides

Medians: from the vertex to the midpoint of the opposite side

Centroid, 2/3 to vertex &1/3 to side

Altitudes: from the vertex & perpendicular to the opposite side Orthocenter

p. 339

Dec 1­9:57 AM

Page 7: Concurrent Line Notes.notebook · Concurrent Line Notes.notebook 1 September 30, 2014 Sep 307:29 AM POD Factor: x2 + 7x 18 Nov 46:38 PM 5.1 and 5.2 Bisectors, Medians, and Altitudes

Concurrent Line Notes.notebook

7

September 30, 2014

Nov 10­6:47 PM

Nov 30­9:18 AM

Homework: p.330 #17-29oddp.340 #5-9odd, 16-19all

Page 8: Concurrent Line Notes.notebook · Concurrent Line Notes.notebook 1 September 30, 2014 Sep 307:29 AM POD Factor: x2 + 7x 18 Nov 46:38 PM 5.1 and 5.2 Bisectors, Medians, and Altitudes

Concurrent Line Notes.notebook

8

September 30, 2014

Nov 10­6:34 PM

Nov 10­7:06 PM