Ussing visual studio C programming

A)Create two functions, one that calculates the area of a triangle and a second one that calculatest he circumference of a circle. In main, ask the user which of the two operations they wish to be carried out, i.e., if a 1 is entered then execute triangle function; if a 2 is entered then execute circle function, otherwise print Invalid input; print results from within main function Note: Use any values for base, height, and radius