(a) The line segment connecting the midpoints of any two sides is parallel to the third side, and its length is exactly half the length of the third side. (b) The three medians intersect in a single point, and this point divides each median in a 2:1 ratio. (Recall that a median of a triangle is a line segment connecting one corner to the midpoint of the opposite side.)
(a) The line segment connecting the midpoints of any two sides is parallel to the third side, and its length is exactly half the length of the third side. (b) The three medians intersect in a single point, and this point divides each median in a 2:1 ratio. (Recall that a median of a triangle is a line segment connecting one corner to the midpoint of the opposite side.)
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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
Transcribed Image Text:Use vector-based methods to prove the following facts concerning a triangle in the plane.
(a) The line segment connecting the midpoints of any two sides is parallel to the third side,
and its length is exactly half the length of the third side.
(b) The three medians intersect in a single point, and this point divides each median in a 2:1
ratio. (Recall that a median of a triangle is a line segment connecting one corner to the
midpoint of the opposite side.)
(Hint: Both statements are invariant under translations, rotations, and scalings of the triangle,
so you may argue that it suffices to consider a triangle with vertices (0,0), (1,0), and (a, b) for
some real numbers a and b to simplify your work.)
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