Question

prove that if two lines intersect,the vertically opposite angle are equal in measure​

Answer 1

Answer:

here is your answer in the above photo

Answer 2

Step-by-step explanation:

angle ABE + angle AEC = 180° (linear pair) ---(i)

angle AEC + angle DEC = 180° (linear pair) ---(ii)

then,

angle ABE+ angle AEC = angle AEC + angle DEC [from equation (i) and (ii)]

angle ABE = angle DEC (equal)

hence , proved / verified

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