generals336

2021-02-09

To find:

The exact circumference of the circle with radius 7 meters and approximate the circumference.

The exact circumference of the circle with radius 7 meters and approximate the circumference.

Nichole Watt

Skilled2021-02-10Added 100 answers

Definition:

Multiplying the decimals as through they are whole numbers.

The decimals point in the product is placed so that the number of decimal places in the product is equal to the sum of the number decimal places in the factors.

Radius of the circle is half the diameter of the circle.

Circumference of the circle is$2\pi r$

The value of$\pi r$ is 3.14

Calculation:

Radius,$r=7$ meters

Circumference of the circle is$2\pi r$

Change$r=7$ and $\pi =3.14\in 2\pi r$

$2\left(3.14\right)\left(7\right)$

$14\cdot 3.14$

Based on the definition,

Multiply the decimals as through they are whole numbers.

$14\cdot 314=4396$

The decimals point in the product is placed so that the number of decimal places in the product is equal to the sum of the number decimal places in the factors.

The number decimal places in the factors is 2.

So, place decimal point from two number from right.

43.96

On rounding off,

43.96 is taken as 44

Answer: Circumference of the circle is 44 meters

Multiplying the decimals as through they are whole numbers.

The decimals point in the product is placed so that the number of decimal places in the product is equal to the sum of the number decimal places in the factors.

Radius of the circle is half the diameter of the circle.

Circumference of the circle is

The value of

Calculation:

Radius,

Circumference of the circle is

Change

Based on the definition,

Multiply the decimals as through they are whole numbers.

The decimals point in the product is placed so that the number of decimal places in the product is equal to the sum of the number decimal places in the factors.

The number decimal places in the factors is 2.

So, place decimal point from two number from right.

43.96

On rounding off,

43.96 is taken as 44

Answer: Circumference of the circle is 44 meters

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