What is the missing step in this proof? O A Statement: slope of DF = slope of BC
Reason: definition of slope
OB. Statement: slope of DF = slope of BC
Reason: Transitive Property of Equality
OC. Statement: DF = BC
Reason: Corresponding sides of congruent triangles are congruent.
OD. Statement: AADF = AABC
Reason: ASA

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step-by-step explanation:

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step-by-step explanation:

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step-by-step explanation:

intersecting chords are just lines that intersect. so a line is equal to 180 degrees, so when it is intersected by another chord, then it create supplementary angles, and because the lines cross, vertical angels are also formed.