Practice Problems 30 Provided by
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Unit 30 Parallel Lines, Similar Triangles, and Congruent Triangles
Part 4 Exponents
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Use angle descriptions A  D and this
figure to answer questions
18.
A) Alternate Interior Angles B) Alternate Exterior Angles C) Corresponding Angles D) Vertical Angles 

9) Triangles ABC and DEF are similar. Find the length of side DF. 
Quick Notes stars all these problems Students have been told
that starred problems are very difficult.
Students are encouraged
not to worry if they can't do these problems because
there are
very few problems of this level on standardized basic mathematics exams.