Exploring Rotation 2
Before Question 4
Move the rotation slider back to 0. Move the point of rotation to (4,2), or in other words, move the x slider to 4 and the y slider to 2. Next, draw a circle using the circle with center through point tool. First click the point of rotation (the red point at (4,2)), then click on point A on the preimage (the brown one). Don't forget to change back to the select tool before moving the slider.
Now rotate the shape so that point B is at the origin. What angle did you rotate by?
Now rotate the shape so that point C is at (4,0). What angle did you rotate by?
Check your answers, redo any exercises you missed, then move on to Exploring Rotation 3.