Using Graph Paper
A Help Page by Mary
Assignment Three
This is an illustration to explain obtaining offset numbers to draw an oval. The graph paper is 20 squares by 20 squares. Each square is 10 so this would be the same as a 200x200 blank on the screen.
Find the green dot. Count the squares to the left side of the graph paper. There are 10 squares. 10x10=100.
Count the squares to the top of the graph paper. There are 10 squares. 10x10=100. Therefore, your first set of numbers would be +100+100.
An oval is either wider or taller on two sides. A circle is the same distance from the center on all sides, but an oval will have a different width than height.
Decide how wide you want your oval to be. Count the squares from the center dot to wherever you want your width to be. I selected 9 squares. 9x10=90.
Now, count the squares from the center dot to wherever you want your height to be. I selected 4 squares. 4x10=40.
Therefore my second set of numbers would be +90+40.
The third set will be +0+360 to make the complete oval.
(Note----if I had put +0+180, it would make half an oval.)
The numbers for this oval would be---
+100+100 +90+40 +0+360.
You can move the center of the oval using the same method as the circle.
Holler if you need help or write to me at Kitkat3L@(remove)webtv.net.
Written this 12th day of September, 2006.
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