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Perimeter & Area

Tim Brzezinski, Ronan Downes, Mar 4, 2020

Geometry: Perimeter & Area Applets

Area (& Perimeter)
1. Composite Figure Template
2. Parallelogram: Area
3. Building Parallelograms with Given Area: Quick Formative Assessment
4. Area of a Rhombus
5. Triangle Area Action! (V1)
6. Triangle Area Action!!! (V2)
7. Area of a Triangle (Discovery)
8. Create a Triangle with Given Area: Quick Formative Assessment
9. Trapezoid: Area (I)
10. Trapezoid: Area (2)
11. Create a Trapezoid with Given Area: Quick Formative Assessment
12. TRUE MEANING of π
13. Circumference = ? (Animation)
14. Circumference = ? (Animation II)
15. Angular to Linear: Without Words
16. Circle Area (by Peeling)
17. Area of a Circle (III)
18. Circle Area (By Peeling!)
19. Scaling Figures: Effects on Areas
20. Regular Pentagon: Area
21. Regular Pentagon: Area (II)
22. Area of a Regular Polygon
23. Regular Polygons: Perimeter & Area
24. Area of a Sector
25. Arc Length and Area of a Sector (V1)
26. Arc Length and Area of a Sector (V2)
27. Segment Area: Quick Investigation
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)
Older Versions of Newer Materials
1. Area of a Circle (by Peeling)
2. Area of a Circle II
3. Area of a Parallelogram (Discovery)
4. Area of a Trapezoid (Discovery)

Information

Area (& Perimeter)

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

Composite Figure Template

TO USE:

1) Use the SEGMENT tool to plot a segment = any side of a polygon you want to create. 2) Use the FILLSQUARE tool to fill in any square unit. Use this template to create figures with specified conditions (involving perimeter and area) your teacher gives you. After doing so, you can go to the menu (upper right) and save your construction to your GeoGebra profile.

HOW TO USE (Quick Silent Demo)

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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)

2.1.

SolveMyMaths Action 3A!

Creation of this applet was inspired by a tweet from Ed Southall (Solve My Maths). In the regular hexagon below, how can you formally prove that the area of the original triangle and parallelogram are equal?

2.2.

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Older Versions of Newer Materials

1. Area of a Circle (by Peeling)
2. Area of a Circle II
3. Area of a Parallelogram (Discovery)
4. Area of a Trapezoid (Discovery)

3.1.

Area of a Circle (by Peeling)

AREA of a CIRCLE: Hit the "Start the Show!" button in the applet below! Then, answer the questions that follow. After answering all 7 questions, refer to the directions below the applet.

After answering all 7 questions, go to the following link: http://tube.geogebra.org/material/simple/id/1844529

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