the sector of a circle has radius of 42 cm and central angle 135 o . find its perimeter ?
"perimeter of the sector = length of the arc + 2 ( radius ) = ( 135 / 360 * 2 * 22 / 7 * 42 ) + 2 ( 42 ) = 99 + 84 = 183 cm answer : e"
multiply(multiply(const_2, divide(multiply(subtract(42, const_3), const_2), add(const_4, const_3))), 42)