Lesson 3

Workshop: Multiplication Methods

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Task

Refer students to the Polygon Names page in the Student Guide Reference section.

    1. acute triangle
    2. obtuse triangle
    3. obtuse triangle
    4. obtuse triangle
    5. acute triangle
    6. obtuse triangle
    7. pentagon
    8. quadrilateral
    9. quadrilateral
    10. right triangle
    11. obtuse triangle
    12. obtuse triangle
    13. right triangle
    14. acute triangle

  2. Pieces with a right angle: 7, 8, 10, 13

    I used a square corner to see where it fit.

For a challenge, copy and enlarge the puzzle. Students can cut out the pieces and reassemble the square.

J. Archimedes' Puzzle

This puzzle is at least 2200 years old. Some people think it was created by the Greek scientist Archimedes.

  1. Name each piece of the puzzle with the name of a polygon. If it is a triangle, tell whether it is acute, right, or obtuse.
    1. _________________________________
    2. _________________________________
    3. _________________________________
    4. _________________________________
    5. _________________________________
    6. _________________________________
    7. _________________________________
    8. _________________________________
    9. _________________________________
    10. _________________________________
    11. _________________________________
    12. _________________________________
    13. _________________________________
    14. _________________________________
  1. Which pieces have a right angle? How do you know?