Success criteria
- I plot and connect points in the stated order.
- I describe a translation using direction and distance.
- I verify my design with coordinates and shape properties.
Learn and explain
The horizontal and vertical side lengths can be read from coordinate differences. That makes the perimeter 14 units. Explain why subtracting x-values works on a horizontal side but not on a diagonal side.
Independent practice
Find the perimeter of rectangle ABCD.
Its side lengths are 4 and 3, so its perimeter is 14 units.
Point C moves 2 right and 3 up. What are its new coordinates?
C moves to (7, 7).
Unfamiliar transfer — Coordinate Battleship (paper fallback)
This is paper-first. On two hidden 10 × 10 first-quadrant grids, each player draws three axis-aligned ships. Call one ordered pair per turn and mark hit or miss. After play, write the coordinates of one ship and explain how you avoided reversing x and y.
The activity is only a coded-game candidate after the core course is on schedule; this lesson does not require software.
Then create a four-to-eight-point logo on graph paper. Translate it without changing its size or shape and list old/new coordinate pairs.
Delayed check
One to two weeks later, reproduce the logo from only its ordered-pair list, then check whether every segment and translation matches.
Evidence path
Save the original and translated coordinate designs to jeremy/portfolio/math/unit-5/lesson-16-coordinate-design/ with a short explanation of two shape relationships.
Next step
- Repair: if plotting errors remain, replay one paper round with axes highlighted.
- Continue: if the design can be reconstructed independently, complete the Unit 5 mixed check.
- Stretch: negative coordinates unlock only after two independent core checks plus explanation and transfer.