Work out the perimeter of a semicircle below give your answer in cm to one d.p

Question

asked Oct 13, 2024 167k views

2 Answers

Soheil Novinfard · Answer 1 · 2024-10-13T11:54:09+0000

Answer:

Explanation:

We have been given diameter of semi circle that is 18.2 cm

Formula for calculation of Perimeter of semi circle:

[Here π = 3.14 and d is diameter]

Plugging the values,

Hence, The perimeter of semi-circle is 25.6 cm.

Sumanth Shastry · Answer 2 · 2024-10-19T19:34:00+0000

Hello!

Let's consider what the question asks for:

--> perimeter of semicircle

The perimeter of a circle can be found with:

--> formula

Perimeter = π * d

-- d: length of diameter --> 18.2 cm

However, a semicircle has half the perimeter of a circle

--> formula

$\text{Perimeter}=(1)/(2)* \pi *d$

Let's plug our diameter into the semicircular formula for perimeter

$\text{Perimeter}=(1)/(2)*\pi *18.2=(1)/(2)*3.14*18.2 =28.57 \text{ cm}^2$

The problem asks us to round to one decimal point

--> Perimeter of semicircle is 28.6

Answer: 28.6 square centimeters