Fill in the blanks in the following statements
A) Two straight lines a, b cut the straight line c and in the corners there are two equal angles.
B) Two straight lines a, b cut the straight line c and in the corners there are equal isotopic pairs ........
C) Two straight lines a, b cut the straight line c and in the corners there are two pairs of corners in the same side.
D) Two straight lines a, b cut the straight line c and in the corners there are a pair of outermost edges.
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