The length of the green table equals the width of the red table. Unbelivable? The width of the green table also equals the length of the red table. Measure it.
You dont' want to look at this for too long. Prepare:
Stare at the four dots in the center of this page for about 30 seconds. Try not to blink. Then lean back, look at the ceiling and blink your eyes a few times. Did you see Jesus?