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A quadrilateral has vertices `(4,1), (1,7),(-6,0)` AND `(-1,-9)`. Show that mid-points of the sides of this quadrilateral form a parallelogram. |
Answer» Mid point of PR`=(((5/2)+(-7/2))/2,((4+(-9/2))/2)` `=(-1/2,-1/4)` MId point of SQ`=(((3/2)-(5/2))/2),((-4+(7/2))/2)` `=(-1/2,-1/4)` `PQ=sqrt(5^2+(1/2)^2)=sqrt(25+1/4)=sqrt(101/4)` `SR=sqrt(5^2+(1/2)^2)=sqrt(25+1/4)+sqrt(101/4)` `RQ=sqrt((-7/2+5/2)^2+(-9/2-7/2)^2)=sqrt65` `SP=sqrt((3/2-5/2)^2+(-8)^2)=sqrt65` `PQ=SR` `RQ=SP`. |
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