CK-12 Geometry-Concepts

(Marvins-Underground-K-12) #1

7.8. Triangle Proportionality http://www.ck12.org



  1. Name the similar triangles. Write the similarity statement.


2.BEEC=FC?


3.ECCB=CF?


4.DB? =BCEC


5.FCFC+?=F E?


Answers:



  1. 4 DBC∼4F EC

  2. DF

  3. DC

  4. FE

  5. DF; DB


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Use the diagram to answer questions 1-7.AB||DE.



  1. FindBD.

  2. FindDC.

  3. FindDE.

  4. FindAC.

  5. What isBD:DC?

  6. What isDC:BC?

  7. We know thatBDDC=AEECandDEBA=BCDC. Why isDEBA 6 =BDDC?


Use the given lengths to determine ifAB||DE.


8.

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