Learning Math and Coding with Robots                                         Grid: Tics Lines: Width px Hash Lines: Width px Labels: Font px Trace Lines: Robot 1: Width px Robot 2: Width px Robot 3: Width px Robot 4: Width px
 Axes: x-axis y-axis Show Grid Grid: 24x24 inches 36x36 inches 72x72 inches 96x96 inches 192x192 inches Quad: 4 quadrants 1 quadrant Hardware Units: US Customary Metric
 Background: Robot 1  Initial Position: ( in, in) Initial Angle: deg Current Position: (0 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

Robot 2  Initial Position: ( in, in) Initial Angle: deg Current Position: (6 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

Robot 3  Initial Position: ( in, in) Initial Angle: deg Current Position: (12 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

Robot 4  Initial Position: ( in, in) Initial Angle: deg Current Position: (18 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

Function: Calculating the Area of a Rectangle Using a Function with a Return Value
Problem Statement:
Use the function block to draw a rectangle with an area of 36 square units. You will need to fill in the variables needed to calculate the area of the rectangle - these blocks are under the "variable" tab. Then you will need to assign values to the dimensions of your rectangle so the area equals 36 square units. Finally, you need to enter in a complete sentence that tells the user the area of their rectangle.
```/* Code generated by RoboBlockly v2.0 */
double area;
double trackwidth = 3.69;
int count;

// Describe this function...
double rectangleArea(double x, double y) {
count = 0;
while(count < 2) {
count = count + 1;
}
return x * y;
}

area = rectangleArea(12, 3);
printf("area is %g square inches.\n", area);
```
 Blocks Save Blocks Load Blocks Show Ch Save Ch Workspace
Problem Statement:
Use the function block to draw a rectangle with an area of 36 square units. You will need to fill in the variables needed to calculate the area of the rectangle - these blocks are under the "variable" tab. Then you will need to assign values to the dimensions of your rectangle so the area equals 36 square units. Finally, you need to enter in a complete sentence that tells the user the area of their rectangle. Time