4.2 Compare Your Answers 1
Completion requirements
Compare your answers.
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Determine the measure of ∠a in the following diagram. Explain your reasoning.
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Label the unknowns in the diagram provided.
| Angles forming a line sum to 180° | Angles in a triangle sum to 180° | Angles forming a line sum to 180° |
|---|---|---|
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|
|
|
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