Question

The diameter of a semicircular protractor is 7 cm. Find its perimeter.​

Answer 1

Answer:

Perimeter of semicircle

$\pi \: r + 2r \\ = \pi \frac{d}{2} + d \\ = \frac{22}{7} \times \frac{7}{2} + 7 \\ = 11 + 7 \\ = 18cm$

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Answer 2

Answer:

Perimeter = 18 cm

Explanation:

From the question, we have

Diameter = 7 cm

Radius (r) = 3.5 cm

Perimeter = π*r+2*r

=$=\pi *r + 2*r\\=\frac{22}{7} *3.5 + 2*3.5\\=11+7\\=18 cm$

Multiplication:

Mathematicians multiply the numbers to find the sum of two or more. It is a fundamental mathematical operation that is frequently employed in daily life. When we need to combine groups of similar sizes, we multiply. The fundamental concept of continuously adding the same number is represented by multiplication. The product of two or more numbers is the result of the multiplication of the factors, which are the amounts being multiplied. It is easier to continually add the same number after the numbers have been multiplied.

To learn more about multiplication visit:

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