Drawing a Rectangle

Drawing and Animating Rectangles in GeoGebra

To draw and animate a rectangle in GeoGebra, follow the steps below.

Step 1: Creating a Slider

Create a slider by clicking the Slider tool, then click the GeoGebra workspace. The following dialog box will appear.

<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhipUnJqSzFHigigPoAaWrFuJg69Nd2M-orbkpVw4KOvizlx5l5BsGT1MeHr73smre7mpiGCbq8dqzAdfegYKCjaapC8S1zeSxcoAGUON9uA6YGBUF1gh5tNbXJHm53J6DZma0It4BKEbw/s1053/Screenshot_4.png" style="margin-left: 1em; margin-right: 1em;">
    <img border="0" data-original-height="568" data-original-width="1053" height="216" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhipUnJqSzFHigigPoAaWrFuJg69Nd2M-orbkpVw4KOvizlx5l5BsGT1MeHr73smre7mpiGCbq8dqzAdfegYKCjaapC8S1zeSxcoAGUON9uA6YGBUF1gh5tNbXJHm53J6DZma0It4BKEbw/w400-h216/Screenshot_4.png" title="slider geogebra" width="400" style="max-width: 100%; height: auto;" alt="Dialog pembuatan slider di GeoGebra" />
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Fill in the dialog box above: Name for the slider name, Min for the minimum value, Max for the maximum value, and Increment for the step size. Then click OK and the slider will appear. Use the Move tool to drag the slider.

Step 2: Create a Rectangle with Lines

To create the rectangle, enter the line equation $y=a$ in the Input box on the left. In the same way, enter $x=a$, $x=6a$, and $y=4a$. After that, the display will look like the image below.

<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiX3hOHwsfEA7_eYli0mu2lehd9rAR1ab3jm1SnHOGfMOz4_gFm2N1sedXNELJGgi6vsWUQwAafD5szGoS4xXydBBKpnOMvsqWrIAkyCTPdhyphenhyphenLI8Ymm_BZn4_wLY1QzbDOVNgWnZsVG3-8/s1289/Screenshot_5.png" style="margin-left: 1em; margin-right: 1em;">
    <img border="0" data-original-height="547" data-original-width="1289" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiX3hOHwsfEA7_eYli0mu2lehd9rAR1ab3jm1SnHOGfMOz4_gFm2N1sedXNELJGgi6vsWUQwAafD5szGoS4xXydBBKpnOMvsqWrIAkyCTPdhyphenhyphenLI8Ymm_BZn4_wLY1QzbDOVNgWnZsVG3-8/s320/Screenshot_5.png" width="320" style="max-width: 100%; height: auto;" alt="Garis-garis pembentuk persegi panjang di GeoGebra" />
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Step 3: Creating Cutting Points

Create the intersection points $A$, $B$, $C$, and $D$ by clicking the Intersect tool on the toolbar, then selecting the two lines that form each point.

<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhYCJQ-cgZQ0VOqLw2-LRU3SBvqacMLDCzObcXX4lhZsxZ3AHfiYVRsjNQleJTjXQP3-UcF5a0yZY6H4Y6Sq1y5agOq-Tr_4-Nhb1yrRu1FkxvIq_1Efh7yoCaE4XE5Aq6n3VhrYU4o3Ic/s1290/Screenshot_6.png" style="margin-left: 1em; margin-right: 1em;">
    <img border="0" data-original-height="527" data-original-width="1290" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhYCJQ-cgZQ0VOqLw2-LRU3SBvqacMLDCzObcXX4lhZsxZ3AHfiYVRsjNQleJTjXQP3-UcF5a0yZY6H4Y6Sq1y5agOq-Tr_4-Nhb1yrRu1FkxvIq_1Efh7yoCaE4XE5Aq6n3VhrYU4o3Ic/s320/Screenshot_6.png" width="320" style="max-width: 100%; height: auto;" alt="Titik potong pada garis di GeoGebra" />
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Step 4: Creating Rectangular Polygons

Create the rectangle by connecting the intersection points. Click the Polygon tool on the toolbar, then click points $A$, $B$, $C$, $D$, and finally return to point $A$.

<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikZBS8TQYNKzGBO3nQSP46jBEQoPspnklTx2zLCehjlPheHxjKesf9ZHZ9NeGGp4ffokOG5KkWJ7YDV31Dx9_ioIXe_SWdurfwK8qSCingWxpxTDJiWsM-w0ibfP8jvmuS_dX6CkSfb5c/s1291/Screenshot_7.png" style="margin-left: 1em; margin-right: 1em;">
    <img border="0" data-original-height="547" data-original-width="1291" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikZBS8TQYNKzGBO3nQSP46jBEQoPspnklTx2zLCehjlPheHxjKesf9ZHZ9NeGGp4ffokOG5KkWJ7YDV31Dx9_ioIXe_SWdurfwK8qSCingWxpxTDJiWsM-w0ibfP8jvmuS_dX6CkSfb5c/s320/Screenshot_7.png" width="320" style="max-width: 100%; height: auto;" alt="Persegi panjang yang terbentuk di GeoGebra" />
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Step 5: Hiding the Auxiliary Lines

Hide the auxiliary lines created earlier by right-clicking each line and disabling Show Object.

<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjZsvmVqCeGtGlzVLrwAZ4YZL9azTXEmHDCu67pJOYPejCZMqnGyfdFDpEXSTVn26AOLeJk6OaodWQn_HSLEbDPgKfE6lpN5DB7r-QeuS5cApm_5BAb037cHpI2c7Q0rOPHHvoJqt_7uSw/s1289/Screenshot_8.png" style="margin-left: 1em; margin-right: 1em;">
    <img border="0" data-original-height="578" data-original-width="1289" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjZsvmVqCeGtGlzVLrwAZ4YZL9azTXEmHDCu67pJOYPejCZMqnGyfdFDpEXSTVn26AOLeJk6OaodWQn_HSLEbDPgKfE6lpN5DB7r-QeuS5cApm_5BAb037cHpI2c7Q0rOPHHvoJqt_7uSw/s320/Screenshot_8.png" width="320" style="max-width: 100%; height: auto;" alt="Garis bantu disembunyikan di GeoGebra" />
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Step 6: Testing Animation with Sliders

When the side slider is moved, the area and perimeter of the rectangle change. This shows that the side length affects both area and perimeter.

Step 7: Tidying Up the Appearance

Tidy up the display by hiding the coordinate axes. To change the color of the slider and rectangle, right-click each object, open the settings, and choose a color.

<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUIS2-wmR41k9zT2FEpOlXvg2sgP1ou7bHtxFNo4eFKrrpPwmTlNiSyroxBLN8CJwjYnsfo-KU8Ovr_FF8acCEcCl9Hv7yys2EKNiMAdW8Qg_sQ_7eFH42wX7FhIS-4t7fbTk32ipDTt4/s1290/Screenshot_9.png" style="margin-left: 1em; margin-right: 1em;">
    <img border="0" data-original-height="566" data-original-width="1290" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUIS2-wmR41k9zT2FEpOlXvg2sgP1ou7bHtxFNo4eFKrrpPwmTlNiSyroxBLN8CJwjYnsfo-KU8Ovr_FF8acCEcCl9Hv7yys2EKNiMAdW8Qg_sQ_7eFH42wX7FhIS-4t7fbTk32ipDTt4/s320/Screenshot_9.png" width="320" style="max-width: 100%; height: auto;" alt="Tampilan akhir persegi panjang di GeoGebra" />
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Video Tutorials

The following video tutorial may help clarify the steps above.

Example of Final Result

Below is an example of the final rectangle animation. Move the red slider a to the right.

Closing

That is the guide to drawing and animating rectangles in GeoGebra. If you have suggestions or feedback, please leave a comment or contact me through the contact menu. I hope this is useful.