a semicircular shaped window has diameter of 63 cm . its perimeter equals
explanation : perimeter of window = { \ color { blue } \ pi } r + 2 r = [ { ( 22 / 7 ) * ( 63 / 2 ) } + 63 ] = 99 + 63 = 162 cm answer : a ) 162
add(divide(circumface(divide(63, const_2)), const_2), 63)