a) Prove that the points \( A(4,3) \), \( B(7,0) \) and \( C(1,-2) \) are the vertices of a triangle.
MR/Nasef.N
and If the point \( D(1,2) \), then prove that the figure ABCD is a trapezoid and find the ratio between AD and BC.
Correct Ratio: (b) 1:2
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