Challenge: reach the target
Press "New target", then set the dials.
Every setting of the dials leaves a red dot. Which points can you reach? That set is called the span of a and b (Module 8).
Turn the dials m and n. The amber arrow is m·a + n·b. Drag the tips of a and b to change the moves.
Every setting of the dials leaves a red dot. Which points can you reach? That set is called the span of a and b (Module 8).