2.6 Special Angles on Parallel Lines

Investigation #1
Line AD is parallel to Line FG in the figure below. [br]1. Use the angle tool to measure all 8 angles in the figure below.[br]2. Click and drag point C to change the angle measures.[br]3. Complete the questions below the figure based on your observations.
Use this figure for Investigation #1
Observation
Which of the following statements is always true about corresponding pairs of angles, like [math]\angle ABC[/math] and [math]\angle FEB[/math]?
Which of the following statements is always true about alternate exterior pairs of angles, like [math]\angle ABC[/math] and [math]\angle GEH[/math]?
Which of the following statements is always true about alternate interior pairs of angles, like [math]\angle ABE[/math] and [math]\angle GEB[/math]?
Which of the following statements is always true about same side interior pairs of angles, like [math]\angle ABE[/math] and [math]\angle FEB[/math]?
Which of the following statements is always true about same side exterior pairs of angles, like [math]\angle ABC[/math] and [math]\angle FEH[/math]?
C-3 Parallel Lines Conjecture
If two parallel lines are cut by a transversal, then corresponding angles are _____, alternate interior angles are _____, and alternate exterior angles are _____.
Investigation #2
In this investigation, we will create the congruent angles first, then observe the relationship between the lines we create. [br]1. Change the angle tool to an angle with given size tool. [br]2. Click B, then D, then change the angle measure to 65[math]^\circ[/math]. Change the direction to clockwise before clicking ok.[br]3. Use the line tool to create line B'D. [br]4. Change the angle with given size tool to the slope tool. [br]5. Click lines B'D and AB to measure the slopes. [br]6. Complete the questions below based on your observations.
Observation
Which of the following statements is true about the slopes of the lines cut by transversal CB?
C-4 Converse of the Parallel Lines Conjecture
If two lines are cut by a transversal to form pairs of congruent corresponding angles, congruent alternate interior angles, or congruent alternate exterior angles, then the lines are _____.
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