the sector of a circle has radius of 7 cm and central angle 135 o . find its perimeter ?
"perimeter of the sector = length of the arc + 2 ( radius ) = ( 135 / 360 * 2 * 22 / 7 * 7 ) + 2 ( 7 ) = 16.5 + 14 = 30.5 cm answer : d"
multiply(multiply(const_2, divide(multiply(subtract(7, const_3), const_2), add(const_4, const_3))), 7)