Question

the area of semi circle of diameter 8r is​

Answer 1

Answer:

50.28 r²

Step by step explanation :

Given that Diameter of circle is 8r .

So , its radius will be 8r/2 = 4r .

Now , area of circle is πr² .

=> Area = π r²

=> Area = 22/7 * (4r)²

=> Area = 22/7 * 16r²

=> Area = 50.28 r² .

Answer 2

Answer:

are of circle is πr^2

area of semicircle will be πr^2/ 2

so radius would be 4r =(8r/2)

are =π(4r)^2/2

=π16r^2/2

= π8r^2

( if vale of pi given then put it accordingly)