Question

1 The diameter of a circle is 3.5 cm. Find the
length of the arc whose degree measure is:
(iv) 90°​

Answer 1

Answer:

2πr/4=22/7*3.5/4=22×0.5/4=11/4°2.75

Answer 2

✨Given ÷

Diameter of Circle = 3.5 cm

Angle / theta = 90°

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✨Concept need to find out....

Length of an arc...= ???

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✨Formula used ...

Length of an arc =

$\color{red} \boxed{\frac{theta}{360} \times2 \pi \: r }$

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✨ Solution...

Diameter = 3.5cm

$radius = > \frac{d}{2} \\ \\ radius = > \frac{3.5}{2} cm \\ \\ length \: ofan \: arc \: = > \frac{theta}{360} \times 2 \times \pi \: r \\ \\ = > > \frac{90}{360} \times 2 \times \frac{22}{7} \times \frac{3.5}{2} \\ \\ = > > \frac{1}{4} \times 22 \times .5 \\ \\ = > > \frac{7}{4} cm \\ \\ = > > 2.75c {m}^{2}$

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Length of an arc = 2.75cm²

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Thanks ☺️✨