Perimeter & Area

Tim Brzezinski, Sep 16, 2015

Geometry: Perimeter & Area Applets

Table of Contents

  1. Area (& Perimeter)
    1. Unit Squares: Multipurpose Template
    2. Constructing Rectangles: Open Middle Problem
    3. Composite Figure Template
    4. Open Middle: Perimeter of a Rectangle
    5. Parallelogram: Area
    6. Building Parallelograms with Given Area: Quick Formative Assessment
    7. Area of a Rhombus
    8. Area of a Triangle (Discovery)
    9. Triangle Area Action! (V1)
    10. Triangle Area Action!!! (V2)
    11. Area of a Triangle (V3)
    12. Create a Triangle with Given Area: Quick Formative Assessment
    13. Trapezoid: Area (I)
    14. Trapezoid: Area (2)
    15. Area of a Trapezoid (3)
    16. Create a Trapezoid with Given Area: Quick Formative Assessment
    17. TRUE MEANING of π
    18. Circumference = ? (Animation)
    19. Circumference = ? (Animation II)
    20. Angular to Linear: Without Words
    21. Circle Area (by Peeling)
    22. Area of a Circle (III)
    23. Circle Area (By Peeling!)
    24. Scaling Figures: Effects on Areas
    25. Regular Pentagon: Area
    26. Regular Pentagon: Area (II)
    27. Area of a Regular Polygon
    28. Regular Polygons: Perimeter & Area
    29. Area of a Sector
    30. Arc Length and Area of a Sector (V1)
    31. Arc Length and Area of a Sector (V2)
    32. Segment Area: Quick Investigation
    33. Area of a Triangle: Intuitive Discovery
    34. Area of a Trapezoid: Intuitive Discovery
  2. Area Problems
    1. SolveMyMaths Action 3A!
    2. SolveMyMaths Action 3B!
    3. SolveMyMaths Action 4!
    4. 4 Triangles Action!!!
    5. What Fractional Part is Shaded? (1)
    6. Create a Triangle with Given Area (V2)
    7. Open Middle: Triangle Area Problem

1.

Area (& Perimeter)

  • 1. Unit Squares: Multipurpose Template
  • 2. Constructing Rectangles: Open Middle Problem
  • 3. Composite Figure Template
  • 4. Open Middle: Perimeter of a Rectangle
  • 5. Parallelogram: Area
  • 6. Building Parallelograms with Given Area: Quick Formative Assessment
  • 7. Area of a Rhombus
  • 8. Area of a Triangle (Discovery)
  • 9. Triangle Area Action! (V1)
  • 10. Triangle Area Action!!! (V2)
  • 11. Area of a Triangle (V3)
  • 12. Create a Triangle with Given Area: Quick Formative Assessment
  • 13. Trapezoid: Area (I)
  • 14. Trapezoid: Area (2)
  • 15. Area of a Trapezoid (3)
  • 16. Create a Trapezoid with Given Area: Quick Formative Assessment
  • 17. TRUE MEANING of π
  • 18. Circumference = ? (Animation)
  • 19. Circumference = ? (Animation II)
  • 20. Angular to Linear: Without Words
  • 21. Circle Area (by Peeling)
  • 22. Area of a Circle (III)
  • 23. Circle Area (By Peeling!)
  • 24. Scaling Figures: Effects on Areas
  • 25. Regular Pentagon: Area
  • 26. Regular Pentagon: Area (II)
  • 27. Area of a Regular Polygon
  • 28. Regular Polygons: Perimeter & Area
  • 29. Area of a Sector
  • 30. Arc Length and Area of a Sector (V1)
  • 31. Arc Length and Area of a Sector (V2)
  • 32. Segment Area: Quick Investigation
  • 33. Area of a Triangle: Intuitive Discovery
  • 34. Area of a Trapezoid: Intuitive Discovery

1.1.

Unit Squares: Multipurpose Template

Choose any number of squares from 1-60. You can move these squares around.
Choose any number of squares from 1-60. You can move these squares around.
Choose any number of squares from 1-60. You can move these squares around.
Choose any number of squares from 1-60. You can move these squares around.
– Tim Brzezinski

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2.

Area Problems

  • 1. SolveMyMaths Action 3A!
  • 2. SolveMyMaths Action 3B!
  • 3. SolveMyMaths Action 4!
  • 4. 4 Triangles Action!!!
  • 5. What Fractional Part is Shaded? (1)
  • 6. Create a Triangle with Given Area (V2)
  • 7. Open Middle: Triangle Area Problem

2.1.

SolveMyMaths Action 3A!

Creation of this applet was inspired by a [url=https://twitter.com/solvemymaths/status/832686295067488258]tweet[/url] from Ed Southall ([url=https://twitter.com/solvemymaths]Solve My Maths[/url]). [br][br][b]In the regular hexagon below, how can you formally prove that the area of the original triangle and parallelogram are equal? [/b][br][br]
– Tim Brzezinski

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Information