If the width of the rectangle is increased by 3 cm and the length by 2 cm, then the perimeter

| April 1, 2021 | education

If the width of the rectangle is increased by 3 cm and the length by 2 cm, then the perimeter will be 78 cm3. Find its sides

Answer: the initial measurements of the rectangle, for example, are: length – 20 cm, width – 14 cm.

1. The perimeter of any polygon is defined as the sum of the lengths of all its sides.

The opposite sides of a rectangle are equal to each other, therefore, to determine the initial length of the perimeter, we should subtract the doubled values ​​of the increase in the sides from the final value:

78 – 2 * 3 – 2 * 2 = 68 cm.

2. Since the length of the rectangle is greater than the width, then, based on this, we will select options for combinations of values ​​for the length of measurements. For example: The length is 20 cm, the width is 14 cm; length 24 cm, width – 10 cm. There can be countless options.



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