Question

find the perimeter of the sector of a circle of radius 21 cm the length of the arc of the sector is 44 cm ?


option:

i). 68 cm. ii). 86 cm


iii). 128 cm. iv). 63



what is answer?



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Answer 1

Given,

Radius of the circle = 21 cm

Length of arc of the sector = 44 cm

To find,

The perimeter of the sector of the circle.

Solution,

We can simply solve this mathematical problem by using the following mathematical process.

Here, we will have to use the mathematical formula, to calculate the perimeter of the sector. Which is -

Perimeter of the sector of a circle = (2 × Radius) + Length of arc that makes the sector

By, putting the given values, we get -

Perimeter of sector of the circle = (2×21)+44 = 42+44 = 86 cm

(This will be considered as the final result.)

Hence, the perimeter of the sector of the circle is 86cm (option ii).