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126 Notes and answers Reg Geo.notebook 1 December 09, 2015 Nov 2812:03 PM Find the lengths of segments formed by lines that intersect circles. Use the lengths of segments in circles to solve problems. Objectives Nov 2812:03 PM

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Page 1: 12-6 Notes and answers Reg Geo.notebook - PC\|MACimages.pcmac.org/.../12-6_Student_Notes_Reg_Geo.pdf · 2019-09-25 · 126 Notes and answers Reg Geo.notebook 3 December 09, 2015 Nov

12­6 Notes and answers Reg Geo.notebook

1

December 09, 2015

Nov 28­12:03 PM

Find the lengths of segments formed by lines that intersect circles.

Use the lengths of segments in circles to solve problems.

Objectives

Nov 28­12:03 PM

Page 2: 12-6 Notes and answers Reg Geo.notebook - PC\|MACimages.pcmac.org/.../12-6_Student_Notes_Reg_Geo.pdf · 2019-09-25 · 126 Notes and answers Reg Geo.notebook 3 December 09, 2015 Nov

12­6 Notes and answers Reg Geo.notebook

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December 09, 2015

Nov 28­12:03 PM

Example 1: Applying the Chord­Chord Product Theorem

Find the value of x and the length of each chord.

10(7) = 14(x)70 = 14x5 = xEF = 10 + 7 = 17GH = 14 + 5 = 19

J

Nov 28­12:03 PM

Check It Out! Example 1

Find the value of x and the length of each chord.

8(x) = 6(5)8x = 30x = 3.75

AB = 6 + 5 = 11CD = 3.75 + 8 = 11.75

Page 3: 12-6 Notes and answers Reg Geo.notebook - PC\|MACimages.pcmac.org/.../12-6_Student_Notes_Reg_Geo.pdf · 2019-09-25 · 126 Notes and answers Reg Geo.notebook 3 December 09, 2015 Nov

12­6 Notes and answers Reg Geo.notebook

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December 09, 2015

Nov 28­12:03 PM

A secant segment is a segment that contains a chord of a circle, and has exactly one endpoint outside the circle. An external secant segment is the part of a secant segment that is outside the circle.

Nov 28­12:03 PM

Page 4: 12-6 Notes and answers Reg Geo.notebook - PC\|MACimages.pcmac.org/.../12-6_Student_Notes_Reg_Geo.pdf · 2019-09-25 · 126 Notes and answers Reg Geo.notebook 3 December 09, 2015 Nov

12­6 Notes and answers Reg Geo.notebook

4

December 09, 2015

Nov 28­12:03 PM

Find the value of x and the length of each secant segment.

Example 3: Applying the Secant­Secant Product Theorem

Nov 28­12:03 PM

Check It Out! Example 3

Find the value of z and the length of each secant segment.

351 = 169 + 13z182 = 13z14 = z

LG = 30 + 9 = 39JG = 14 + 13 = 27

Page 5: 12-6 Notes and answers Reg Geo.notebook - PC\|MACimages.pcmac.org/.../12-6_Student_Notes_Reg_Geo.pdf · 2019-09-25 · 126 Notes and answers Reg Geo.notebook 3 December 09, 2015 Nov

12­6 Notes and answers Reg Geo.notebook

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December 09, 2015

Nov 28­12:03 PM

Nov 28­12:03 PM

Page 6: 12-6 Notes and answers Reg Geo.notebook - PC\|MACimages.pcmac.org/.../12-6_Student_Notes_Reg_Geo.pdf · 2019-09-25 · 126 Notes and answers Reg Geo.notebook 3 December 09, 2015 Nov

12­6 Notes and answers Reg Geo.notebook

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December 09, 2015

Nov 28­12:03 PM

Example 4: Applying the Secant­Tangent Product Theorem

Find the value of x.

Nov 28­12:03 PM

Check It Out! Example 4

Find the value of y.

DE  DF = DG2

7(7 + y) = 102

49 + 7y = 1007y = 51

Page 7: 12-6 Notes and answers Reg Geo.notebook - PC\|MACimages.pcmac.org/.../12-6_Student_Notes_Reg_Geo.pdf · 2019-09-25 · 126 Notes and answers Reg Geo.notebook 3 December 09, 2015 Nov

12­6 Notes and answers Reg Geo.notebook

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December 09, 2015

Nov 28­12:17 PM

Assignment(p. 843) 2­22 even