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proving theorems about triangles: mastery test
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tools
select the correct answer from each drop-down menu.
points a, b, and
form a triangle. complete the statements to prove that the sum of the interior angles of abc is 180°.
statement
reason
points a, b, and form a triangle.
given
let de be a line passing through band parallel to ac. definition of parallel lines
23 25 and 21 x 24
corresponding angles theorem
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