1.Let me define the ax midpoint first. Mid point way that point on the line segment i m sorry divides the heat segment right into two equal parts.

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So, alternative 1 is invalid.

2. option 2 is also invalid.why this is invalid because if S is mid allude of AB, it means, SA=SB.

3. choice 3 is invalid. Two lines are parallel if ,

(a) sum of interior angles top top the very same side of Transversal is 180 degree.

(b) matching angles room equal.

(c) alternating interior or exterior angles room equal.

4. choice 4 is true i beg your pardon is ,DE=FA,

→→if this are matching sides of congruent triangles, climate it must be equal.

As, once triangles space congruent , their matching sides and interior angles of two triangles space equal.

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