Question

1)Prove it: The sum of measures of all angles of a triangle is 180°
2) Prove it: Every point on the perpendicular bisector of a segment is equidistant from the end points of the

segment.
3) Prove: If a pair of alternate angles formed by a transversal of two lines is congruent then the two lines

are parallel.

4)Prove that, if a line is perpendicular to one of the two parallel lines, then it is perpendicular to the other

line also.
5)State and prove: If two sides of a triangle are congruent then the angles opposite to them are congruent.

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Answer 1

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