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Name: ____________________________________________________________ Date: _________________________ Chapter 2: Keyword Proofs Topic 7 Homework: Unknown Angles in Proofs Period: _______ Before we start, here are some things to keep in mind: -The sum of the interior angles of a triangle are ___________________ degrees. Are a and b congruent?_________ What type of angles are these called? _______________________ - Parallel lines cut by a transversal: Think about what angles are congruent and supplementary? What are the names of the congruent angles? (Hint: One example could be corresponding angles.) Complete the examples below, using your knowledge of Geometry. 1.) In the given diagram, prove that 2.) In the given figure, . Prove that Hint: You can add letters or numbers to the angles as needed. 3.) Using the diagram at the right, prove that . Hint: Remember the properties for parallel lines cut by a transversal.