Line Joining Midpoints on a Triangle

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Illustration used to prove “The line joining the mid-points of two sides of a triangle is parallel to the third side and equal to one half the third side.”


C.A. Hart, Daniel D. Feldman Plane and Solid Geometry (New York, NY: American Book Company, 1911)


TIFF (full resolution)

2400×910, 109.0 KiB

Large GIF

1024×388, 14.3 KiB

Medium GIF

640×242, 7.8 KiB

Small GIF

320×121, 3.7 KiB