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TRANSCRIPT
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mikegraham Chapter 3.notebook
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February 25, 2020
Answers
This investigation allows students to discuss a proof of the sine law and explain it using their own words. Help students understand how the proof extends their exploration in Lesson 3.1, in which they obtained equivalent ratios. You may also want to use The Geometer's Sketchpad® to verify the sine law.
Pull forLessonNotes
• Construct an acute triangle ABC
Nov. 27, 2012Feb. 25, 2020
• If we construct an acute triangle ABC again, and used the line BE, we notice:
Dec. 9, 2013
Using acute triangle ABC to prove the Sine Law
Jan. 5, 2016
Page 118
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mikegraham Chapter 3.notebook
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February 25, 2020
Law of SinesUsed with an oblique triangle to find a missing side or angle.
a = b = cSin A Sin B Sin C
Only 2 parts of this proportion will be used to solve each problem.
Example 1: Solve for 'c'
A
C
65
21 cmB35
Example 2: Solve for 'x'
47.7 cm
x 11229.5 cm
Nov. 27, 2012
Feb. 25, 2020Dec. 9, 2013
Jan. 5, 2016
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mikegraham Chapter 3.notebook
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February 25, 2020
Applications of Trigonometry1. Abel Island and Bolton Island are 3 km apart. How far is Carter Island from
Abel Island and Bolton Island on the given map?
Page 125 #3, 4, 6, 8 & 10
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Attachments
PM113s2.gsp
SMART Notebook
Page 1: 3.2 Page 2Page 2: Law of sines lesson #1Page 3: Applications in TrigAttachments Page 1