Four mark example problems I — task. Mathematics State Board, Class 7.

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In the following figures, polygons are formed by increasing the number of sides using matchsticks as given below.

Find the number of sticks required to form the next three shapes by tabulation and generalisation.

Answer:

Generalisation \(=\)

Number of sticks required to form \(6^{th}\) shape \(=\)

Number of sticks required to form \(7^{th}\) shape \(=\)

Number of sticks required to form \(8^{th}\) shape \(=\)

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11. Four mark example problems I