An Introduction to
Myself - Math Activity
The two squares below are
exactly alike. They both have sides that equal 102 pixels (102 pixels
high by 102 pixels wide.
If you want to make one
square half as small, and keep the same square proportions, what
dimensions would the smaller square have? (Click on the arrow to
review ratios and proportions in our last task. )
The ratio of height to
width in both cases is the same. It is 1:1.
Now, let's change that
ratio for the image.
What would the shape
measure if the ratio were 2:1 (2 heights to 1 width?
Well, let's double the
height to 204 pixels. That would keep the width at 102 pixels.
Do you see how shapes change
proportions as the ratio changes?
OK. Now let's keep the
same ratio (2:1) and make the same rectangle one third as small. That
means we are going to divide the sides by 3!
What are the dimensions
for our smaller rectangle that is one third as small?
Did we keep the same
1: Open a new slide (review previous tasks is you need to)
and select the blank slide layout.
a rectangle using the tools in your toolbar. To find out the
dimensions of the shape you drew, right-click in
the shape. Select Format Auto Shape.
When the panel opens study
the different information about the rectangle you drew.
on the SIZE tab. Notice the height and
the width information. You can change those in this panel if you
Notice the LOCK
ASPECT RATIO box. If you click that box, you can change the
size of your shape, but the ratio and proportions will remain the
same. Go ahead and play with that feature. Change the size on the
slide and check it. Change the size in the panel and check it.
Using the panel above, make a perfect square. Go to your slide view,
and COPY the square (Select the square,
and go to EDIT -> COPY).
the square somewhere else on the slide.
Drag the second square
somewhere else on the slide.
Select the second square
and open the same panel you opened before: FORMAT
AUTO SHAPE. Click on the SIZE tab.
Make sure the RATIO LOCK box is
checked. Change the height of the square to half its size.
Now the second square is
half as big as the other.
Select the smaller
square and change its color.
Print this page,
sign it, and place it in your portfolio.
When you are finished,
delete the slide with the shapes and save your presentation again.
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Department of Education through the Cortez Adult Education Program.
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ŠUnlimited Learning, 2004