Plotting Points and
Transformations
Warm-up
3x  5  2  (5 x  7)
What is 7% of 28?
9 x  12 x  6
40% of 36 is what?
Plotting Points
A (5, 1)
B (-2, 4)
C (0, -4)
D (-3, -1)
E (2, 0)
Give the coordinates.
B
C
D
A
E
Find the perimeter of the rectangle
formed by connected the points
A (1, 2) B (4, 2) C(1, 5) D (4, 5)
Transformations – movements of
the geometric figure
Pre-image – position of the figure before the
transformation.
Image – the position of the figure after the
transformation.
Types of Transformations
Reflection – figure is flipped over a line
Types of Transformations
Translation – (slide) -figure is slid in any direction
Types of Transformations
Dilation – a figure is enlarged or reduced
Types of Tranformations
Rotation – a figure is turned around a point
Point P(4, 3) is translated 5 units to
the left and 2 units down. Write the
coordinates of the image P’.
A translation slides P (-5, -2) 8
units to the right and 4 units up,
write the coordinates of the
image P’.
What are the coordinates of the
image of triangle ABC if it slides 3
units right and 2 units down?
A
B
C
Triangle BAC has coordinates B (3,
4), A (9, 2) and C (5, 6). State the
coordinates of the image of triangle
BAC after a slide of the triangle 4
units to the left and 3 units up.
Rotation
Rotation of 180º.
Reflection – flip over a line
Two flips is the same
as rotating the original
figure 180º clockwise
about the origin.
Reflect about the y-axis
Reflect about the x-axis.
Rotate the figure 180º about the
origin.
Homework
Worksheet