The sides of the rectangle are 5 cm and 8 cm. What is its area?

| January 9, 2021 | education

The sides of the rectangle are 5 cm and 8 cm. What is its area? How much will the area of the rectangle increase if the smaller side is increased by 2 cm?

Let’s calculate the area of ​​the rectangle about the formula S = a × b, where a, b are the sides of the rectangle.
S = 5 × 8.
S = 40.
The area of ​​the rectangle is 40 square centimeters.
5 <8, so we increase 5, as the smallest of the sides, by 2.
5 + 2 = 7.
Now let’s calculate the area of ​​the rectangle.
S = 7 * 8.
S = 56.
When the smaller side is increased by 2, the area of ​​the rectangle is 56 square centimeters.
Let’s find how much the area of ​​the rectangle has increased.
56 – 40 = 16.
Answer: The area of ​​a triangle is 40 square centimeters, when the smaller side increases by 2, the area of ​​the rectangle becomes 16 square centimeters larger.



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