Question

The radius of a semicircular protector is 35m then its perimeter

Answer 1

Answer:110+35=145

Step-by-step explanation:Perimeter of semicircle=Πr+r so area of given fig.=(22×35÷7)+35=145

Answer 2

Answer:

Step-by-step explanation:

Formula for perimeter of circle/circumference is

C= 2πr

So,Formula to find perimeter if semicircular protector will be

C= (2πr÷2)+2r

(Reason- we have to divide it by 2 because in case of semicircle circumference is half of the circle Plus the diameter of the circle i.e. 2r )

So, here in this case perimeter/circumference

=((2*π*35)÷2)+(2*35)

=(219.91÷2)+70

=109.95+70

=179.95

hence, answer is 179.95m