Math, asked by bb9456351, 1 month ago

. If the diameter of a circle is 7 cm then write the length of its semi- circular arc. ​

Answers

Answered by Jashumaster
13

Answer:

18 cm

Step-by-step explanation:

length of arc is perimeter of semi circle hence

2 r = 7

r = 7/2

formula

πr+ 2r

22/7×7/2+7

18 cm ...

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Answered by Swarup1998
1

The required length of the semi-circular arc is 18 cm.

Tips:

If r be the radius of a circle, then the length of its semi-circular arc is given by

L=\pi r+2r

Step-by-step explanation:

Given, the diameter of the circle = 7 cm

Then radius = \dfrac{7}{2} cm

Thus the length of the semi-circular arc

= \pi\times\dfrac{7}{2}+2\times\dfrac{7}{2} cm

= \dfrac{22}{7}\times\dfrac{7}{2}+7 cm

  • since \pi=\dfrac{22}{7}

= (11 + 7) cm

= 18 cm

#SPJ3

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