Question

find the length of a sector of a circle of radius 3.5cm and angle 90degrree ​

Answer 1

Answer:

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Step-by-step explanation:

The sum of angles of major and minor sector is 360°. From the given figure, OAPB is a the major sector . Hence, the Length of OAPBO is 21.67 cm.

Answer 2

Answer:

Concept:  finding the length of the sector by multiplying the degree in radians with radius.

Given: radius is 3.5cm and angle is 90°

To find: the length of the arc

Step-by-step explanation:

as we know that the angle of the circle is 360° and the angle of the sector is one-fourth of the angle of the circle

to find the length , the formulae is radius*∅(in radians).

here, ∅ is the angle of the sector.

and to convert it into sector , we will do   $90*\frac{\pi }{180}$

so the ∅is  $\frac{\pi }{2}$.

hence, the length is  $\frac{\pi }{2}*3.5$

so, it is $1.75\pi$ which is $5.49$cm.

therefore, the length is $5.49$cm

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