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3D OBJECT ROTATION
Module 11 Lesson 2
PICTURE IT
 With this lesson make sure you can visualize what the question is asking. Draw
a picture or search images on the Internet
THE TOUGH QUESTION
 The following is the most missed question in M11 L2. The content is the same
but the number is changed.
 A square with an area of 100cm^2 is rotated to form a cylinder. Find the
volume.
 Hint: Visualize it.
SEE IF THE PICTURE HELPS
 Here is what the word problem is talking about.
The dotted line is
the line of rotation,
the square is going
to rotate around
its side.
The square creates a
cylinder that has the
radius equal to the
length of one side of the
square and the height of
the cylinder is equal to
one side of the square
HOW TO SOLVE IT
 Since the area of the square is 100cm^2, that means each side of the square
is 10
 According to the picture, the radius of the cylinder is 10 and the height of
the cylinder is 10.
 V=Ah (capital A means area of the base)
 V=2

 V= (10^2)(10)
 V=3142cm^3

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3D object rotation

  • 2. PICTURE IT With this lesson make sure you can visualize what the question is asking. Draw a picture or search images on the Internet
  • 3. THE TOUGH QUESTION The following is the most missed question in M11 L2. The content is the same but the number is changed. A square with an area of 100cm^2 is rotated to form a cylinder. Find the volume. Hint: Visualize it.
  • 4. SEE IF THE PICTURE HELPS Here is what the word problem is talking about. The dotted line is the line of rotation, the square is going to rotate around its side. The square creates a cylinder that has the radius equal to the length of one side of the square and the height of the cylinder is equal to one side of the square
  • 5. HOW TO SOLVE IT Since the area of the square is 100cm^2, that means each side of the square is 10 According to the picture, the radius of the cylinder is 10 and the height of the cylinder is 10. V=Ah (capital A means area of the base) V=2 V= (10^2)(10) V=3142cm^3