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Geometry

Today: 8.4 Instruction Practice. Even if you're on the right track, you'll get run over if you just sit there. Will Rogers. Geometry. Assignment: Real Life and Radical WS. Yesterday. Even if you're on the right track, you'll get run over if you just sit there. Will Rogers.

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Geometry

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  1. Today: 8.4 Instruction Practice Even if you're on the right track, you'll get run over if you just sit there. Will Rogers Geometry

  2. Assignment: Real Life and Radical WS Yesterday Even if you're on the right track, you'll get run over if you just sit there. Will Rogers

  3. 8.4 Similar Triangles Objectives: • Identify similar triangles • Use similar triangles in real life Vocabulary: AA~

  4. Angle-Angle (AA) Similarity Postulate If two angles of one triangle are congruent to two angles of another triangle, then the two triangles are similar. If K  Y and J  X, then  JKL   XYZ. K Y L Z J X

  5. W X V Y Z Are the triangles below similar?

  6. 33 L M 106° Are the triangles similar? N 20 36° P Q 30 Write the similarity statement. Find the scale factor. Find MN. 11:10 MN = 22

  7. If two polygons are similar, then the ratio of any two corresponding lengths (such as perimeters, altitudes, medians, angle bisector segments and diagonals) is equal to the scale factor of the similar polygons.

  8. 12 M N 12 P 6 Q T R 8 8 S Given NP is parallel to RT. Find the length of altitude QS.

  9. Given ΔJML ~ ΔQMN, KM and MP are medians, KM = 12, MP = 18, MQ = 3x and JM = x + 4. Find x.

  10. Indirect Measurement: On a windy day, you notice another student outside in the front of the school whose jacket has been carried up to the top of the flagpole. As you watch this student attempt to climb the flagpole to retrieve their jacket you start to wonder exactly how tall the flagpole is. Since you have plenty of time to ponder as you are watching the student climb you begin to realize things… You notice that you are exactly 6 feet tall and you are currently casting (as your friend tells you by walking from heel to toe) a three foot shadow. You then figure out that the flagpole is casting an 18 foot shadow. Assuming that the sun’s rays are forming the same angle on you and the flagpole, what is the height of the flagpole?

  11. Assignment: 8.4 p483 #12-20, 45-47, 53 Geometry Even if you're on the right track, you'll get run over if you just sit there. Will Rogers

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