Posted by MOLETE on Tuesday, September 13, 2011 at 4:22pm.
in rectangle ABCD:points J,K,L and M are the midpoints of sides AB,BC,CD and DA respectively: AB=24cm andAD=10cm . what kind of quadrilateral is JKLM?

MATH  MathMate, Tuesday, September 13, 2011 at 7:51pm
Draw the diagonal BD and join the midpoints JM.
Consider the similar triangles ADB and AMJ. Can you prove that MJ (line joining midpoints of AD and AB) is parallel to DB?
Can you repeat with triangles CBD and conclude that MJ is parallel to LK?
Similarly can you prove that ML is parallel to JK?

MATH  Anonymous, Thursday, December 17, 2015 at 10:09am
What is the most precise name for quadrilateral ABCD with vertices A(5, 1), B(5, 3), C(2, 3), and D(2, 1)?
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