anonymous
  • anonymous
Next to each figure below fill in (a) number of lines of symmetry and (b) all the angles of rotational symmetry. Write "none" where necessary.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
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anonymous
  • anonymous
did you draw those lines?
anonymous
  • anonymous
yes

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anonymous
  • anonymous
you are doing it right.
anonymous
  • anonymous
what are angle of rotational symmetry?
anonymous
  • anonymous
and how do i figure out what it is for each shape?
anonymous
  • anonymous
the first object has four angles the bottom left and bottom right are symmetric and the top left and top right are symmetric
anonymous
  • anonymous
in the case of the square it has 4 angles which are all symmetric
anonymous
  • anonymous
the equivalent triangle has 3 angles which are all symmetric to each other
anonymous
  • anonymous
so the first shape has a 180 degree rotational symmetry?
anonymous
  • anonymous
and the square has a 90 degree rotational symmetry?
anonymous
  • anonymous
oh man i my answers are incorrect
anonymous
  • anonymous
an object with rotational symmetry, also known in biological contexts as radial symmetry, is an object that looks the same after a certain amount of rotation. An object may have more than one rotational symmetry; for instance, if reflections or turning it over are not counted. The degree of rotational symmetry is how many degrees the shape has to be turned to look the same on a different side or vertex. It can not be the same side or vertex.
anonymous
  • anonymous
so the first one's degree of rotational symmetry is 180 degrees
anonymous
  • anonymous
the square has 90 180 270 and 360
anonymous
  • anonymous
the triangle is 60 120 and 180
anonymous
  • anonymous
the fourth one is 180
anonymous
  • anonymous
how is the triangle 180 shouldnt it be 360 rotated all the way around?
anonymous
  • anonymous
im sorry, yes the equatorial triangle has 120 240 and 360 degrees of rotational symmetry
anonymous
  • anonymous
the isocelles triangle has 360 degrees of rotational symmetry
anonymous
  • anonymous
does the 4th shape have two lines of symmetry?
anonymous
  • anonymous
it only has one
anonymous
  • anonymous
oh yeah i see that
anonymous
  • anonymous
you cant split it down the middle because its crooked.
anonymous
  • anonymous
and no lines of symmetry?
anonymous
  • anonymous
what do you mean no lines of symmetry
anonymous
  • anonymous
i meant no angles of rotational symmetry for the 4th shape
anonymous
  • anonymous
yep
anonymous
  • anonymous
take a picture of your paper and post it over here once you have finished doing it all
anonymous
  • anonymous
okay one second
anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
ok i posted it
anonymous
  • anonymous
the first one has no angles of rotational symmetry
anonymous
  • anonymous
or you could right 360 degree
anonymous
  • anonymous
write*
anonymous
  • anonymous
6. 2 lines of symmetry 7. only 180 degree rotational symmetry
anonymous
  • anonymous
hmm this is so confusingif 7. has four lines of symmetry doesnt that mean that it has four angles of rotational symmetry also??
anonymous
  • anonymous
|dw:1378225549462:dw|
anonymous
  • anonymous
so 7. has 180 and 360 then?
anonymous
  • anonymous
doesnt every shape have 360 degree rotational symmetry though?
anonymous
  • anonymous
every shape has 360 degree rotational symmetry because 0 degree and 360 degree are exactly the same states so it doesnt matter if you skip 360 degree in your answer because its the same as the original position.
anonymous
  • anonymous
so the 7th one has 180 degree rotational symmetry
anonymous
  • anonymous
ok, so i should put none if a shape only has a 360 degreee rotation?
anonymous
  • anonymous
so number 5. ill put no rotational symmetry.
anonymous
  • anonymous
?
anonymous
  • anonymous
no. 5 would be no rotational symmetry
anonymous
  • anonymous
and in no. 2 and 3 you can take off 360 degree but its okay if you decide to keep it
anonymous
  • anonymous
oh okay thanks alot! i get it now .
anonymous
  • anonymous
that's great!
anonymous
  • anonymous
wow man, me and my brother and sister all went through american school of correspondence and all struggled with this question, and we all refer to this, thank you so much Paul1231

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