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D   The number of points of intersection of two perpendicular lines is
   D
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D   Find the value of x.
   D
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D   Write the first step of an indirect proof of the following statement:
A is not a right angle.
   D
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D   Which of the following statements can be used to say: AOC + COB = AOB?
   D
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D   Find the value of x.
   D
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D   Write the first step of an indirect proof of the following statement:
AB and CD are perpendicular lines.   D
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D   What conclusion follows from the following pair of statements?
1. If two non vertical lines are perpendicular, then the product of their slopes is - 1.
2. The product of the slopes of non vertical lines l and n is not - 1.   D
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D   Which of the following is the reason for the statement: 1 is congruent to 2?
   D
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D   It is given that mA = mB. Which of the following is the reason for the statement: A B?   D View Solution
D   It is given that mA = 90 and m B = 90. Which of the following is the reason for the statement: mA = mB?
   D
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D   1 and 2 are complementary angles. Which of the following statements can be used to say: 1 + 2 = 90o ?   D View Solution