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Solved Examples
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DD  Select the postulate or theorem that can be used to prove that lines P and Q are parallel.  DD View Solution
DD  State the postulate or theorem you would use, to prove that 2 and 3 are congruent.
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DD  State the postulate or theorem you would use, to prove that lines l and m are parallel.
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DD  State the postulate or theorem you would use, to prove that lines m and n are parallel.
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DD  1 and 2 are supplementary. State the theorem or postulate to prove l || m.
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DD  In the triangle ABC, DE¯ || BC¯, BAC = 40° and ACB = 80°. Which theorem / postulate will help you to prove ADE = 60°?  DD View Solution