math

1. Which figure has rotational symmetry? (1 point)
diamond
sideways t
polygon...
polygon
2. Indicate whether the following statement is true or false. If a figure can be translated, then it will tessellate. (1 point)
True, all translations are tessellations.
False, not all translations are tessellations...




4. Find the coordinates of the image of point R(3, –5) rotated 180° about the origin. (1 point)
(–3, 5)
(–5, –3)...
(5, 3)
(3, –5)
5. Which figure can be used to create a tessellation? (1 point)
petagram
polygo...
circle
arrow

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  1. #1
    Question looks incomplete, not sure what "polygon..." stands for what. Please complete question.
    However, all regular polygons have rotational symmetry.

    #2
    Translation is just one way to tessellate. There are three other ways, reflection, rotation, and glide reflection (i.e. reflection followed by a translation, or vice versa).
    You only have to find one shape that that tessellates, but not with translation alone to declare the statement false. (e.g. try a triangle).

    #3 is not posted.

    #4
    a 180° rotation is obtained by the following operation:
    R_180: (x,y)→(-x,-y).
    For example, point (5,-2) rotated about the origin is (-5,2), and so on.

    #5
    Pentagram is a 5-sided star. Try to see if you can tessellate it.
    There are many kinds of regular polygons, some can tessellate, and some cannot.
    (To find out what is a regular polygon, see:
    https://www.mathsisfun.com/geometry/regular-polygons.html
    )
    Regular polygons have internal angles equal to A=180(n-2)/n, where n is the number of sides.
    The polygon can tessellate if A divides 360, i.e. fits around a point.
    This means that 360/A must be a whole number to tessellate, or
    360/(180(n-2)/n)
    =2n/(n-2) must be a whole number.
    This way, you can find all the regular polygons that can tesselate.
    For example, for a triangle, n=3,
    and 2*3/(3-2)=6 is a whole number, so a "regular triangle", or equiangular triangle can tesselate.
    For an arrow, try to see if you can tessellate. I did not find a way to do that.

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  2. so what are the answers

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  3. answer?

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  4. Answers
    1.A
    2.C
    3.D
    4.A
    5.B
    6.Yes but you have to explain why
    These are for CCA Math lesson 10 Rotational Symmetry and rotations Quiz

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  5. Mr.pickles is correct!

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  6. mr.pickles is correct 5/5

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  7. 5. would be a pentagon

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  8. 6. Yes, it does. As a Ferris wheel has a circular shape, it will have the same position every 45 degrees, because it has 8 cars. (1/8 of 360 = 45)

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  9. I got 100%. Mr Pickles is correct. But on question #6, put it into your own words.

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  10. Mr. Pickles [ amazing name ] is correct,

    I got 100% for 2019

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  11. tysm mr pickles! I agree with anon mouse awesome name XP

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  12. Correct answers are:
    1. A
    2. False
    3. D
    4. A
    5. B
    6. A. When you rotate it 60 degrees (360/3), they look exactly like it did before because every corner is at 60 degrees.
    B. Yes, because it doesn't overlap nor doea it have gaps, so there for they can be used on a flat roof and not leak.

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  13. Thank you Mr Pickles!

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  14. I believe wrong is right

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  15. Go Mr.Pickles!

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  16. For the Connections Academy Mathematics Topic:
    "Lesson 10: Rotational Symmetry and Rotations
    Essential Math 7 B Unit 4: Graph in the Coordinate Plane"

    Here is the answer key:
    Rotation Symmetry and Rotations
    Responses saved. The current score is 5/5. There is still 1 ungraded question worth 2 possible points.

    1. A
    2. False
    3. D
    4. A
    5. B
    6.
    (P.S. You will have to write this out in your own words, but you should get a good grade on it.)
    (P.P.S. Just Read The User "Wrong"s Essay Answer for Number 6 Then Write It in Your Own Words.

    Have A Nice Day!
    - Lou

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  17. Mr. Pickles is 100% correct! Thank you!

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  18. Mr.Pickles thank you I got 100%

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  19. thx everyone i got 100%

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  20. OMG THANK YOU SO MUCH MS PICKLES I GO A 100%

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  21. @Mrpickles i'm confused on question 6. can you explain PLEASE!!!!

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