Idea 8of 15Builds onFlip across the line
Flip, then flip again
What happens when a shape flips across two lines, one after the other?
Today you'll discover
- which line runs up and down
- where the first flip lands
- where the second flip lands
Think firstA triangle in the top left, and two lines
Flip across the up-and-down line, then across the side-to-side line. Where does the triangle end?
Decide first, then press Next. Name each line before you flip across it.
Squared paper with a vertical line and a horizontal line crossing in the middle, and a right triangle in the top left. The first flip puts a green copy in the top right; the second flip puts a blue copy in the bottom right. A dashed line joins the start to the end, marked a half turn from the start.
See the whole ideathe big idea and the key word, in one place
The big idea
Flip across a vertical line, then a horizontal line, and the shape lands in the opposite corner.
Compare themVertical runs up and down, like a flagpole. Horizontal runs side to side, like the edge of a table.
Key words
- vertical
- running straight up and down
- horizontal
- running straight side to side
Ready to use it?
- Flip a shape across a vertical line, then across a horizontal line.