Class 9 Exam > Class 9 Notes > Lab Manual: Find a Hidden Picture by Plotting
Lab Manual: Find a Hidden Picture by Plotting - Class 9 PDF Download
Objective
To find a hidden picture by plotting and joining the various points with given coordinates in a plane.Materials Required
Cardboard, White paper, Graph paper, Scissors, Adhesive, Geometry box
Prerequisite Knowledge
Knowledge of cartesian coordinate system.
Procedure
- Take a cardboard of suitable size and paste a white paper on it.
- Take a graph paper and paste it on the white paper.
- Draw two coordinate axes X’OX and Y’OY. (see Fig. 17.1)
- Plot the points A, B, C,… with given coordinates (a, b), (c, d), (e, f), …. respectively, (see Fig. 17.2)
- Join the points in the given order say A → B → C → D → … → A. (see Fig. 17.3)
Demonstration
By joining the points as per given instructions, a hidden picture of an ‘aeroplane’ is formed.
Observation
From Fig. 17.3
Coordinates points A, B,C,D, …….. ,
are …….. , …….. , …….. , …….. , …….. , …….. , …….. , and hidden picture is of …….. .
Result
We have found the hidden picture by plotting and joining the various points with givèn coordinates in a plane.
Application
This activity is helpful in understanding the plotting of points in a cartesian plane which is further useful in preparing the road maps and sitting plan of the classroom.
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