2.5 Angle Relationships

Investigation #1
1. Use the angle tool to measure one linear pair of angles in the diagram below.[br]2. Use the arrow tool the click and drag point D to change the angle measures. [br]3. Complete the questions below the figure based on your observations.
Use this figure for Investigation #1 and Investigation #2.
Observation
Which of the following statements is always true about the linear pair of angles?
C-1 The Linear Pair Conjecture
If two angles form a linear pair, then they are _____.
Investigation #2
1. Use the arrow tool to select and then delete one of your 2 angle measures. [br]2. Use the angle tool to measure the angle that is vertical to the angle measure that is left. [br]3. Click and drag point D to change the angle measures.[br]4. Complete the questions below based on your observations
Observation
Which of the following statements is always true about the pair of vertical angles?
C-2 Vertical Angles Conjecture
If two angles are vertical angles, then they are _____.
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