### 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: (-36 in, 0 in) Current Angle: 0 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 2

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

#### Robot 3

 Initial Position: ( in, in) Initial Angle: deg Current Position: (0 in, 24 in) Current Angle: 0 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 4

 Initial Position: ( in, in) Initial Angle: deg Current Position: (0 in, 36 in) Current Angle: 0 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

Drive Around a Roundabout
Problem Statement:
The robot starts at point A (-36,0) on the grid. The preplaced block drives the robot to point B. Change the blocks so that the robot drives to point C at (36,0).
```/* Code generated by RoboBlockly v2.0 */
#include <linkbot.h>
double r;
double d;
CLinkbotI robot;
double radius = 1.75;
double trackwidth = 3.6;
int count;

// r is the radius of the circular roundabout
r = 18;
d = 2 * (M_PI * (double(r)/360));
robot.setSpeed(5, radius);
robot.driveDistance(18, radius);
robot.turnRight(90, radius, trackwidth);
count = 0;
while(count < 180) {
robot.driveDistance(d, radius);
robot.turnLeft(1, radius, trackwidth);
count = count + 1;
}
robot.turnRight(90, radius, trackwidth);
robot.driveDistance(18, radius);
```
 Blocks Save Blocks Load Blocks Show Ch Save Ch Workspace
Problem Statement:
The robot starts at point A (-36,0) on the grid. The preplaced block drives the robot to point B. Change the blocks so that the robot drives to point C at (36,0).

Time