New to Programming . . .Need Help

For one of my classes I have to write basic Java code that will compute the area of a rectangle, triangle and circle. Here are the directions for the first:

Quote:

The area of a rectangle is found by multiplying its ase and height. As such, define 3 integer variables in "main" : two for the base and height, and one for the area. Your program should read the base and height using the following format: Rectangle's base: 7 , Rectangle's height: 6 . . . and it should wrrite to the screen in the following format "the area of a rectangle of base 7 and height 6 is 42.

The next shape is a Triangle:

Quote:

Continue extending your program by adding operations to calculate the area of a triangle.

The area of a triangle is found by multiplying its base and height and dividing this result by 2.

As such, define 3 additional variables in “main”: two integers for the base and height, and one double for the resulting area.

Your program should read the base and height using the following format

Triangle’s base: 21

Triangle’s height: 3

…and should write to the screen in the following format

The area of a triangle of base 21 and height 3 is 31.5

The next shape is a Circle:

Quote:

The area of a circle is found by multiplying the square of its radius by π. For simplicity, assume that the value of π is 3.14159. The square of the radius is calculated by multiplying it by itself.

As such, define 2 additional double variables in “main”: one for the radius, and one for the area.

Your program should read the radius using the following format

Circle’s radius: 5

…and write to the screen in the following format

The area of a circle of radius 5.0 is 78.53975

Thanks, if you only have time to help with one that would still be greatly appreciated.

Dan