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\ 06-Jan-2025 Surendra Prajapati Proof-7 Reader’s Sign _______________________ Date __________

Learning by Doing

objective: To develop an understanding of proportion through
enlargement/reduction in figures.
Materials Required: Square dot paper or graph paper, pencil and paper

Procedure:
• Students will work in pairs on a square dot paper or graph paper.

• The teacher can ask to draw a letter of the alphabet or a numeral or any simple shape as
shown in the figure below with their enlarge shape.

• Next, the students will try to double, triple, half or quarter it. Discuss if they are able to
do it correctly or not.

• Teacher will evaluate the student’s drawing on these basis:
(a) Did their drawing seem right to them?

(b) What kind of errors did they make?
(c) What could have caused the errors?

• Compare the ratio of corresponding sides and find the constant of the variation.

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MAths connect

Lakshita is conducting an experiment to determine how the weight of a metal changes with its
volume. Based on the data she collected from the experiment, she made the following observations:
Observation 1: As the volume of the metal increases, the weight also increases.
Observation 2: The weight of the metal per cubic centimetre remains constant.
Which observation(s) is/are sufficient to conclude that the weight and the volume of the metal are in direct
proportion?
(a) Only observation 1 is sufficient. (b) Only observation 2 is sufficient.
(c) Both observations are required. (d) Neither observation is sufficient.

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