Question

HELP PRONTO PLEASE
WILL MEDAL AND FAN

Which regular polygon with an apothem of 5 inches, will have a perimeter that is the closest to the circumference of a circle with a diameter of 10.8 inches?

square
pentagon
hexagon
octagon

Answer 1

correction
it is diameter
radius is 5.4
\[BC=\sqrt{\left( 5.4 \right)^2-5^2}=?\]
AC=2 BC
circumference c =2 pi r=pi d
no. of sides \[=\frac{ c }{ AC }\] (round it )