### 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

Draw a Sphere
Problem Statement:
The pre-placed blocks draw a circle. Add ellipse arcs to make the sphere appear 3D. Label the sphere.
/* Code generated by RoboBlockly v2.0 */
#include <chplot.h>
CPlot plot;

plot.strokeColor("black");
plot.fillColor("#cccccc");
plot.circle(18, 18, 9);
plot.strokeWidth(2);
plot.lineStyle("--");
plot.ellipseArc(18, 18, 18, 6, 0, 0, 180);
plot.line(18, 18, 27, 18);
plot.lineStyle("-");
plot.ellipseArc(18, 18, 18, 6, 0, 180, 360);
plot.text("r", PLOT_TEXT_LEFT, 19, 19);
plot.grid(PLOT_OFF);

plot.label(PLOT_AXIS_XY, "");
plot.grid(PLOT_OFF);
plot.tics(PLOT_AXIS_XY, PLOT_OFF);
plot.axis(PLOT_AXIS_XY, PLOT_OFF);
plot.axisRange(PLOT_AXIS_XY, 0, 36);
plot.ticsRange(PLOT_AXIS_XY, 6);
plot.sizeRatio(1);
plot.plotting();
 Blocks Save Blocks Load Blocks Show Ch Save Ch Workspace
Problem Statement:
The pre-placed blocks draw a circle. Add ellipse arcs to make the sphere appear 3D. Label the sphere.

Time