Hold down the shift key and click and drag on the window to move the axes. Hold down the shift key and scroll down/up to zoom in/out.[br][br]In this application, you can click and drag points B, C, and D to form angles using 2 rays, 3 rays, or 2 lines.

Check “2 Ray”.[br][br][1] Make an angle for each classification: acute, right, obtuse, and straight. Record the angle measure and sketch the angle.[br][br][2] Can you make a 0° angle? What does it look like?[br][br]Uncheck “2 Ray” and check “3 Ray”. [br][br][3] Place D in the interior of ∠BAC. [br]a. Sketch your figure.[br]b. What are the measures of the three angles that these three rays form?[br]c. What is the relationship between these measures?[br]d. Move point D back and forth, keeping it in the interior of ∠BAC. As you move it, what do you observe about the measures of the angles?[br][br][4] Move B, C, and D so that all three angles are the same measure. [br]a. Sketch the figure.[br]b. What are the measures of the angles?[br][br][5] Move B, C, and D so that two angles form a linear pair.[br]a. Sketch the figure.[br]b. What are the measures of the angles?[br][br][6] Move B, C, and D so that two angles are complementary.[br]a. Sketch the figure.[br]b. What are the measures of the angles?[br][br][7] Move B, C, and D so that two angles are supplementary.[br]a. Sketch the figure.[br]b. What are the measures of the angles?[br][br]Uncheck “3 Ray” and check “2 Line”. [br][br][8] Name a pair of vertical angles.[br][br][9] Make the lines perpendicular. [br]a. Sketch the graph. [br]b. How do you know the lines are parallel?[br][br][9] Play around with the program. Look for patterns. If you think you see something that might be true, make a conjecture.