Question

find the radius of semicircle whose perimeter is given as 22cm​

Answer 1

Answer:

Perimeter of semicircle means it's circumference

Therefore Circumference of semicircle= πr =22cm

On solving this equation we get the value of radius(r)

22/7×r =22

r= 22×7/22

r=7 cm

Therefore radius of semicircle is 7cm

Answer 2

Given:-

• Perimeter of Semi- circle is 22 cm.

To find:-

• Radius of semi-circle

$\huge \tt \: ☃\:SolutioN$

☘ Perimeter of semi-circle = πr + 2r

Put the perimeter in Formula

⇒22 = $\frac{22}{7}×$ r + 2r

⇒22 = $\frac{22}{7}$ × r + 2r

⇒22 × $\frac{7}{22}$ = 3r

⇒7/3 = r

Thus , Radius of semi-circle is 7/3 cm

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More information:-

• Area of semi-circle = $\frac{1}{2}$ ×πr².