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nerdyotter

  • one year ago

Could you check my answers in this album? Even just one or two answers will do. Thank you! I appreciate it. http://imgur.com/Bkw6Brn,E7MGlLK,uuITm3H,fMh5wK0,UYrTwTV,FwA8Ssi,1vmd093,1YYlnRL,1O14iJc,ai01Ou2,NCbkv4g,hK34Ucu,FQVo0ih,D2UkhhN#0

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  1. nerdyotter
    • one year ago
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    Oh, and I understand that none of the answer options for question 4 are correct. If I don't get that question right, I'll have to Email my teacher about it. This happens a lot more than it should.

  2. mathstudent55
    • one year ago
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    1 - 3 all correct 4. all answers are incorrect, but you chose the closest 5-7 all correct 8 I don't know bec I don't know topology 9 correct 10 incorrect 11 - 14 correct

  3. nerdyotter
    • one year ago
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    @mathstudent55 Thank you! But, if I may ask, why is 10 incorrect?

  4. nerdyotter
    • one year ago
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    Would it be 4 : 9, since the scale factor is 2/3 and I have to square that?

  5. mathstudent55
    • one year ago
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    I'm glad you asked. When two figures are similar, and there is a scale factor between them, then the scale factor applies to the linear measurements. Look at these two cubes: |dw:1439516359301:dw|

  6. mathstudent55
    • one year ago
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    Notice the cubes: linear scale factor: 1:3 = 1:3 area scale factor = 6:54 = 1:9 volume scale factor = 1:27 Notice that the area scale factor in the square of the linear scale factor, and the volume scale factor is the cube of the linear scale factor.

  7. mathstudent55
    • one year ago
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    In your problem: AR = 10 & RE = 5, so AE = 15 Linear scale factor = 10/15 = 2/3 Area scale factor = (2/3)^2 = 4/9

  8. mathstudent55
    • one year ago
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    You are correct.

  9. nerdyotter
    • one year ago
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    @mathstudent55 Thank you so much! You seriously have been a huge help.

  10. mathstudent55
    • one year ago
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    You're welcome. You did a great job!

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spraguer (Moderator)
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