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Sagot :
Given -
- the diameter of a semicircle is 6 yards.
ie. d = 6yd
ps - use 3.14 for a
To find -
- the semicircle's perimeter
Solution -
As we know the formula to find the perimeter of the semicircle is 2r + πr.
But A.T.Q we are only provided with the diameter. As we know that the radius is half of the diameter. ie, r = d/2.
Hence, d = 6
r = 6/2
r = 3 yd
Perimeter of semicircle = 2r + πr
Perimeter of semicircle = 2(3) + 3.14(3)
Perimeter of semicircle = 15.42 yd
Hence forth the semicircle's perimeter is 15.42 yd
❦ Question -:
The diameter of a semicircle is 6 yards. Find the perimeter of the semicircle?
❦ Explanation -:
Given :
- Diameter of the semicircle
Need to find :
- Perimeter
Solution :
[tex] \small \blue {\underline {\underline{{ \orange{\rm{ First \: we \: need \: to \: calculate \: the \: radius \: of \: the \: semicircle }}}}}}[/tex]
We know,
[tex] \large \star \: \: \large \underline{\boxed{ \rm{ Radius = \dfrac{Diameter}{2}}}}[/tex]
[tex] \small\rm{ Radius = \dfrac{6}{2} = 3 \: yards}[/tex]
[tex] \small{ \underline{ \underline{\rm \red{ Now \: we \: will \: calculate \: the \: perimeter \: of \: the \: semicircle }}}}[/tex]
We know,
[tex] \large\star \: \: \large \underline{\boxed{ \rm{ Perimeter_{(semicircle)} = πr + 2r}}}[/tex]
Where,
- r stand for radius
- Assuming π as 3.14
Substituting the values we get
[tex] \small\bf{ Perimeter_{(semicircle)} = 3.14 × 3 + (2 × 3)}[/tex]
[tex] \small\rm{ Perimeter_{(semicircle)} = 9.42 \: + 6}[/tex]
[tex] \small\boxed{ \rm{ Perimeter_{(semicircle)} = 15.42 \: yards}}[/tex]
[tex] \rule{92mm}{3pt}[/tex]
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