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872
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avatar+492 

Help.

 Jan 23, 2017
 #1
avatar+448 
+5

the first one is C

the second one is A

 Jan 23, 2017
 #2
avatar+128079 
0

If it is not raining, then I will not carry an umbrella

 

Two intersecting lines are perpendicular if and only if they form four 90° angles

 

 

 

cool cool cool

 Jan 23, 2017

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