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D Two parallel lines L_{1} and L_{2} are cut by a transversal T. Use the figure to find how are ∠4 and ∠5 related. D

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D If m∠1 = m∠8 and line l is parallel to line m, then which of the following is true? 1. Line n is perpendicular to lines l and m. 2. All the angles 1 to 8 are equal. D

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D In the figure, if m∠1 = m∠5, then are the lines L_{1} and L_{2} parallel? D

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D L_{1} and L_{2} are parallel lines ; ∠2 and ∠6 are D

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D Select the correct statement(s) I. If m∠1 = m∠6 and r  s, then m∠1 = 90^{o} II. r need not be parallel to s even if m ∠1 = m∠6 III. If m∠2 = m∠8, then r  s. D

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D What is the value of x? [Given a = 3, b = 4, c = 14 and d = 21] D

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D In the figure, if m∠3 = m∠7, then are the lines L_{1} and L_{2} parallel? D

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D L_{1} and L_{2} are parallel lines ; ∠3 and ∠6 are D

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D What is the value of x? [Given a = 5, b = 5, c = 20 and d = 20] D

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D If p and q are parallel and m∠A = 115, find the m∠1 and m∠2. D

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D If m∠2 = m∠7 and line l is parallel to line m, then which of the following is true? 1. Line n is perpendicular to lines l and m. 2. All the angles 1 to 8 are equal. D

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D In the figure, if m∠4 = m∠8, then are the lines L_{1} and L_{2} parallel? D

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D Two parallel lines L_{1} and L_{2} are cut by a transversal T. Use the figure to find how are ∠3 and ∠6 related. D

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D L_{1} and L_{2} are parallel lines ; ∠4 and ∠5 are D

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D L_{1} and L_{2} are parallel lines. ∠ABL_{2} equals D

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D AB  CD, m∠ABO = 60 and m∠CDO = 45. Find the measure of ∠BOD. D

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D What is the value of x? [Given a = 5, b = 2, c = 7 and d = 7] D

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D Select the correct statement(s) I. If m∠2 = m∠5 and r  s, then m∠2 = 90^{o} II. r need not be parallel to s even if m ∠2 = m∠5 III. If m∠1 = m∠7, then r  s. D

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D The lines j and k are parallel. Find the values of x and y in the figure shown. D

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D The lines l and m are parallel. Find the values of x and y in the figure shown. D

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D If p and q are parallel and m∠A = 110, find the m∠1 and m∠2. D

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D The lines p and q are parallel. Find the values of x and y. D

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D Find the measures of ∠A and ∠B if the lines AB and CD are parallel to each other. D

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D The lines a and b are parallel. Find the m∠M and m∠P. D

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