Articles | ICT Standard IX | ICT Standard X |
Information and Communication Technology Geogebra.
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Articles | ICT Standard IX | ICT Standard X |
Articles | ICT Standard IX | ICT Standard X |
Geogebra Plot the points A(4, -3) and B (-2, 5). Join them and find the equation of the line passing through these points. |
1. Open Geogebra. Make sure that the Co-ordinate Axes and the Grid is displayed. 2. Click on Tool No 2, and Select ‘New Point Tool’. | Figure 1 |
3. Click on the point (4, -3). A new point A will be plotted as shown. | Figure 2 |
4. Click on the point (-2, 5). A new point B will be plotted as shown. | Figure 3 |
5. Click on Tool No 3 and select ‘Line between 2 points Tool’. | Figure 4 |
6. Click on point A followed by point B. A line will be drawn through points A and B and the equation of this line will be displayed in the Algebra section of the display. 7. Save your file or print it if required. | Figure 5 |
Articles | ICT Standard IX | ICT Standard X |
Articles | ICT Standard IX | ICT Standard X |
Using the Input Box in Geogebra 3) What would you use to type the equation for drawing a graph in Geogebra?OR What is the use of the Input Box in Geogebra? |
Using the input box at the bottom of the Geogebra Screen we can enter different objects on the Graphics area of the Geogebra Window. Points, lines, circles, segments, midpoints of segments, Polygons etc., can be easily drawn in the Geogebra Window. The usual operators used in Computers are still applicable. ‘+’ for Addition, ‘-‘ for Subtraction ‘*’ for multiplication and ‘/' for division ‘^’ for exponentiation. Multiplication can also be done by the following methods. E.g., 2*x is same as 2x and is same as 2 x. The Algebraic representation of the Command will be displayed in the Algebra Section. Examples of Commands (Give any two examples for a two mark Question) |
Command | Use of the command | Output |
A=(3,4) | Plots a point A (3,4) on the Graph | |
Segment[A, B] | Draws a segment between points A and B. The Points A and B must be previously defined. | |
Line[A, B] | Draws a line passing through the points A and B. The equation of the line will be displayed in the Algebra section. | |
Circle[(2,3), 2] | Draws a circle with center at point (2,3) and Radius 2 Displays the equation of the circle as c: (x - 2)² + (y - 3)² = 4 | |
Circle[A, AB] | Draws a Circle with center at the point A and with Radius equal to length of Segment AB. The equation is displayed in the Algebra Section | |
Circle[C, AB] | Draws a Circle with center at the point C and with Radius equal to Segment AB. The equation is displayed in the Algebra Section. | |
Circle[A, B] | Draws a Circle with Center at A and with a point B on the Circle. (AB is the radius) The equation is displayed in the Algebra Section. | |
Circle[A, B, C] | Draws a Circle passing through the points A, B and C. The equation of the circle will be displayed in the Algebra Section. | |
AngleBisector[B,A,C] | Draws a Line Bisecting the angle formed by the three points B, A and C. The equation of the line is displayed in the Algebra Section. | |
Area[A, B, C] | Finds the area of the Triangle having vertices A, B and C. The answer is displayed in the Algebra Section under Number. | |
Area[A, B, D, C] | Finds the area of the Rectangle (Polygon) having vertices A, B, D and C. The answer is displayed in the Algebra Section under Number. | |
Area[c] | Displays the area of the circle (c) in the number Section | |
Circumference [c] | Displays the circumference of the Circle (c) under Number Section. | |
Incircle[A, B, C] | Draws the Incircle of the triangle having vertices A, B and C. | |
Midpoint [A, C] | Displays the midpoint between the points A and C. |