The midpoint divides the distance in two equal parts.
The yellow ball.
Practice makes perfect
The distance between the red and the green ball is 10 inches. The distance between the yellow ball and the pallino, the small white ball, is 8 inches. Let's mark them in the picture.
We know that the green ball is the midpoint of the red ball and the pallino. A midpoint divides a distance into two equal lengths. The distance between the green ball and the pallino must, therefore, also be 10 inches.
The green and yellow balls are 10 and 8 inches from the pallino, respectively. Thus, the yellow ball is closer.
