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DO NOW
DO NOW
Work with a partner to study the pupil of the eye. What happens to the pupil in dim light? What happens in bright light?
Work with a partner to study the pupil of the eye. What happens to the pupil in dim light? What happens in bright light?
LEARNING TARGET
LEARNING TARGET
I can dilate a figure on the coordinate plane.
I can dilate a figure on the coordinate plane.
I DO
I DO
What do I need to know today?
For dilations, you need a pre-image (in this case, triangle ABC), and a point from which it will be dilated (the center of dilation), in this case, O.
You also need a scale factor, which tells you how much to shrink or stretch the figure.
Each point of the image will lie on the line that connects the center of dilation to that point of the pre-image.
The dilation is an enlargement is the scale factor is greater than 1. It's a reduction if the scale factor is between 0 and 1.
You can find the points of the image using the following formula:
D(x, y) by scale factor n → D(nx, ny)
WE DO
WE DO
Let's do a couple of problems together. Work on your own when you're ready!
YOU DO
YOU DO
Complete these problems (front and back for a 3, additional pages for one point each)
Additional practice (one point per page)
INdependent review
INdependent review
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