reporter

a reporter that takes an angle (a number) as input and reports the tangent of that angle

a built-in turtle variable that holds the width of the line that the turtle will draw (or erase)

a reporter that takes a distance (a number) as input and reports the patch that is that distance ahead of the current turtle (along the turtle’s current heading)

a reporter that takes a turtle or patch as input and reports the distance between the current agent and the given turtle or patch.