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The midpoint of a triangle is the 3rd sides' size, divided by 2.
The midpoint formula: (X1+ X2 /2, Y1+Y2 /2) *Each divided by 2 Just plug the two coordinates of the segment that you want to find the midpoint of
Theorem: The line segment connecting the midpoints of two sides of a triangle is parallel to the third side and is congruent to one half of the third side. Proof: Consider the triangle ABC with the midpoint of AB labelled M. Now construct a line through M parallel to BC.
It could be the diameter of a circle that produces 2 congruent segments or the midpoint of a line segment