F–1
Name
Date
Optical Illusions with Geometry
Look at these two figures.
Are the two vertical lines the
same length?
Use a ruler to verify your prediction.
Were you correct?
This is an optical illusion. Optical illusions can visually be seen in different ways.
They sometimes play tricks on your eyes and make you see things that are false.
Look at this 2-D hexagon.
Can you draw a 3-D cube?
Hint: you only need to draw
three lines.
Do you see the cube sitting on a face or on a point?
Do you see a cube missing any faces?
Discuss Your Thinking Look at the optical illusions below and discuss what you
see with a classmate.