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23. ABCD is a quadrilateral in which AD=BC . if P,Q,R,S be the mid point of AB,AC,CD,and ND respectively, show that PQRS is a rhombus

Answer» 23. ABCD is a quadrilateral in which AD=BC . if P,Q,R,S be the mid point of AB,AC,CD,and ND respectively, show that PQRS is a rhombus


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