Lab Manual: Find a Hidden Picture by Plotting | Lab Manuals for Class 9 PDF Download

Objective

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.