Question

pls solve this
useless ans-report
correct ans-brainliest​

Answer 1

circumference = 2πr

circumference, given = 176 cm

2πr = 176 cm

$2 * \frac{22}{7} * r = 176$

$\frac{44}{7} * r = 176$

$r = 176 * \frac{7}{44}$

$r = 28 cm$

the radius of the circle is 28 cm.

area of circle = π$r^{2}$

= $\frac{22}{7} * 28^2$ = $22 * 4 * 28$ = 2464$cm^2$

perimeter of semi circle = πr + 2r = r(2 + π)

= $28 * (2+\frac{22}{7} )$ =  $28 * \frac{36}{7}$ = 4 * 36 = 144cm

area of semi circle = (πr^2) /2

= $\frac{\frac{22}{7}* 28 * 28 }{2}$ = $\frac{22 * 28 * 28}{2 * 14}$ = 22 * 28 = 616$cm^2$

the radius of the circle is 28 cm.

area of circle = 2464$cm^2$

perimeter of semi circle = 144cm

area of semi circle = 616$cm^2$

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