Mathematics: What fraction of the circumference is this arc?

What fraction of the circumference is this arc?

Ответ:

isabel81ie

28.01.2022

Mathematics

Step-by-step explanation:

We have,

An arc subtends an angle of $\dfrac{\pi}{2}\ rad$ or 90 degrees.

It is required to find the fraction of the circumference is this arc. The ratio is given by :

$\dfrac{\text{arc length}}{2\pi r}=\dfrac{\text{angle}}{360}\\\\\dfrac{\text{arc length}}{2\pi r}=\dfrac{90}{360}\\\\\dfrac{\text{arc length}}{2\pi r}=\dfrac{1}{4}\\\\\text{arc length}=\dfrac{2\pi r}{4}\\\\\text{arc length}=\dfrac{C}{4}$

So, the arc length is one fourth of the circumference.

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Ответ:

grayammip095l9

13.12.2020

Mathematics

The 3rd one - I don't seem too sure with the answer, you know the 1st question's 2nd part, right?

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

# ꧁❣ RainbowSalt2²2² ࿐

Hey what's the answer show step by step explanation if u don't know.u don't need to answer

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What fraction of the circumference is this arc?

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