Transformations on the Coordinate Plane: Slide, Flip, Turn, Resize

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Mathematics · Math 7-8 / Pre-Algebra
SP-MATH68-019  ·  Free to print and use in your classroom  ·  substituteplans.com
Page 2
Transformations on the Coordinate Plane:
Slide, Flip, Turn, Resize
Mathematics · Math 7-8 / Pre-Algebra · Grades 8 · 50 minutes
Time needed
50 minutes (one class period)
Prep
Copy the 2-page worksheet (one per student). Optional: sketch a coordinate grid on the board.
Technology
None. Calculators are optional for arithmetic only.
Student
independence
High. Students work alone, then compare with a partner.
Copies to make
One 2-page worksheet per student
Materials
Pencils, Worksheet
Goal for today: Students will apply translations, reflections, rotations and dilations to points on the coordinate plane
using coordinate rules and will identify which transformations preserve size.
Before the bell
☐ Copy the worksheet, one per student (2 pages).
☐ Write on the board: Translate = slide. Reflect = flip. Rotate = turn. Dilate = resize. Reflect across
the x-axis: (x, −y). Across the y-axis: (−x, y). Rotate 180°: (−x, −y). Rotate 90° clockwise: (y, −x).
☐ Optional: draw a simple x-y grid on the board. Students may sketch on scrap paper, but all answers can be
found with the rules.
Say this to start
Good morning! Today’s math is about transformations, which means sliding, flipping, turning or resizing a shape on a
coordinate grid. Each transformation has a rule that changes the x and y numbers. The rules are on the board and the
worksheet tells students exactly which one to use. Your job is to keep everyone working.
Run of show
Minutes
What you do
What students do
0–5
Take attendance as the school requires. Hand out
worksheets face down.
Settle in with a pencil.
5–12
Read the board aloud. Then read this example: translate
the point (2, 3) with the rule (x + 3, y − 2). Add 3 to x and
subtract 2 from y to get (5, 1).
Follow along and copy the example.
12–25
Tell students to complete the Triangle table. Each row
gives a rule to use on points A, B and C.
Apply each rule to the three points and
write the new coordinates.
25–38
Tell students to do questions 1–9 (matching and point
problems).
Match the rules to their names, transform
point P and find areas.
38–46
Have students finish question 10, the Error Detective table
and question 11. Read the answers aloud from the key.
Find the mistakes and check their own
work.
46–50
Collect all worksheets and stack them for the teacher.
Hand in the worksheet.


SubstitutePlans.com
Mathematics · Math 7-8 / Pre-Algebra
SP-MATH68-019  ·  Free to print and use in your classroom  ·  substituteplans.com
Page 3
If things go wrong
• If a student mixes up the x and y order, remind them x is the first number and y is the second.
• If a student forgets negative signs, suggest circling every minus sign before they start.
• If a student asks which way clockwise goes, tell them it is the direction a clock’s hands move.
• If a student finishes early, use the early finisher list.
Early finishers
• Pick a point of your own and apply all four transformations to it. Trade with a neighbor to check.
• Find where the point (3, −4) lands after reflecting across the x-axis and then across the y-axis. Name a single
transformation that does the same.
Support and challenge
• Support: Allow students to sketch a grid and plot the points. Complete only the first two rows of the table and
questions 1–5.
• Challenge: Ask students to find the coordinates after rotating the triangle A(1, 1), B(4, 1), C(4, 5) 90°
clockwise about the origin (answer: (1, −1), (1, −4), (5, −4)).
Notes for the teacher (you fill this in)
Jot a few lines before you leave. A full Daily Sub Report is in the free Sub Survival Kit at SubstitutePlans.com.
How far the class got / what to pick up next:
Students who were especially helpful:
Anything the teacher should know: