1.

Consider a grid with 8 parallel vertical edges and 9 parallel horizontal edges, consecutive edges being separated by distance unity- (i) Find the number of rectangles in this grid. (ii) Find the number of reactangles whosebothsides are odd. (iii) Find the number of squares with even sides. (iv) Find thenumber of squares in this grid. (v) Number of ways two squares ofsides, 1xx1 can be chosen so that they have a side in common.

Answer»


ANSWER :(i) `- 1008`, (ii) `-320`, (iii) `-68`, (iv) `-168`, (v) `-97`


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