This document discusses various optical illusions involving images that can be interpreted in multiple ways, such as a rabbit and duck, a face and saxophone player, or different ages and genders of people. It prompts the reader to make observations about lines, shapes, sizes, and counts that may appear different than what is measured. The concluding statements explain that appearances can be deceiving and that carefully examining figures from multiple perspectives is important.

1. OPTICAL ILLUSIONS

2. Do you see the the rabbit and the duck?

3. Do you see a lady’s face and the person playing a saxophone?

5. Can you see the face? Can you read the word?

6. Do you see the old man and the couple kissing?

8. Do you see the old lady and the young lady?

9. Do you see the old lady and the young lady?

10. Can you see the spotted dog?

11. Don Quixote by Octavio Ocampo

15. There are 9 people in this picture. Can you find them all?

16. Woman In Vanity... Or Skull?

17. Do you see the cow?

18. Which frog has a bigger mouth? Are you sure? Measure to find out.

19. Which horizontal line is longer? Measure to find out.

20. Which white rectangle is larger? Measure to find out.

21. Which vertical line is longer? Measure to find out.

22. Read going down the middle and then read going across the middle.

25. The lines of the letters are not connected.

26. Read this.

28. Is the dot inside the box or outside?

30. How many legs?

31. The black lines are parallel.

32. The gray lines are parallel.

33. The red lines are all straight.

43. Throughout the book, you will be asked to make many conjectures about geometric figures. Explain why you should not make conclusions about figures based only on their appearance.

44. You can't always believe what you see. Things aren't always what they appear to be. We have to sometimes think about things in a different way to find a solution.