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Do Now Make sure you have the following Lined paper Ruler Partner with a book 3-30-09 If you were told the ratio from figu...
Objective <ul><li>Look at the side splitter theorems.  </li></ul>3-30-09
Experiment time <ul><li>You and a partner will have 15 minutes to work on the experiment on page 308. </li></ul><ul><li>Yo...
3-30-09
<ul><li>Take a minute to organize your conclusions.  </li></ul>3-30-09
Label one of your from #1  triangles like this.  <ul><li>Measure AB and AD. What do you find? </li></ul><ul><li>Measure AE...
Conclusions 3-30-09
Theorem 4.1 The Parallel Side Splitter Theorem <ul><li>If the segment with endpoints on the two sides of a triangle is par...
Theorem 4.2 The Proportional Side-Splitter Theorem <ul><li>If the segment with endpoints on two sides of a triangle splits...
H/W <ul><li>Pg 311 #1-5 </li></ul>3-30-09
3-30-09
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Geometry 4.11 Side Splitter Thms

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March 30th 2009

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Geometry 4.11 Side Splitter Thms

  1. 1. Do Now Make sure you have the following Lined paper Ruler Partner with a book 3-30-09 If you were told the ratio from figure A to B was 150% and the side length of A was 2 inches. How long is the side length of figure B.
  2. 2. Objective <ul><li>Look at the side splitter theorems. </li></ul>3-30-09
  3. 3. Experiment time <ul><li>You and a partner will have 15 minutes to work on the experiment on page 308. </li></ul><ul><li>You should each complete Part 1A of the experiment in your notebook. Use lined paper to make the parallel lines and measure the distances between lines and the point. </li></ul>3-30-09
  4. 4. 3-30-09
  5. 5. <ul><li>Take a minute to organize your conclusions. </li></ul>3-30-09
  6. 6. Label one of your from #1 triangles like this. <ul><li>Measure AB and AD. What do you find? </li></ul><ul><li>Measure AE and AC. What do you find? </li></ul>3-30-09 A B C D E
  7. 7. Conclusions 3-30-09
  8. 8. Theorem 4.1 The Parallel Side Splitter Theorem <ul><li>If the segment with endpoints on the two sides of a triangle is parallel to the third side then… </li></ul><ul><li>The segment splits the sides it intersects proportionally </li></ul><ul><li>The ratio of the length of the side of the triangle to the length of the parallel segment is the common ratio </li></ul>
  9. 9. Theorem 4.2 The Proportional Side-Splitter Theorem <ul><li>If the segment with endpoints on two sides of a triangle splits those sides proportionally then the segment is parallel to the third side. </li></ul>
  10. 10. H/W <ul><li>Pg 311 #1-5 </li></ul>3-30-09
  11. 11. 3-30-09

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