Idea 3of 15Builds onSlide every corner
Which slide was it?
A shape has already moved. How do you work out the slide?
Today you'll discover
- which corner to follow
- how to write the slide
- how to check it
Think firstA triangle and its slid copy
Corner A went from (2, 2) to (9, 8). What was the slide?
Decide first, then press Next. Match corner A to corner A.
A coordinate grid with a white triangle, corners A (2, 2), B (5, 5) and C (1, 6), and a green copy of it up and to the right with corner A at (9, 8). An L-shaped arrow follows A 7 right and 6 up; then arrows from B and C show the same slide.
See the whole ideathe big idea and the key word, in one place
The big idea
To find a slide, compare one corner with its image: across first, then up or down.
Compare themThe start and its image are congruent and face the same way. Only where they sit has changed.
Easy to get wrongMatch the right corners: A to A, not A to whichever corner of the copy is nearest.
Key word
- image
- the shape or point you get after a move
Ready to use it?
- Describe the slide that moved a shape to its image.