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ABCD is a trapezium in which AB || DC, BD is a diagonal and E is the mid-point of AD. A line is drawn through E parallel to AB intersecting BC at F (see Fig. 8.30). Show that F is the mid-point of BC. Q.4

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How i solve the question of class 9th ncert math of Quadrilaterals chapter of exercise 8.2 of question no 4 . I think it is very important question of class 9th give me the tricky way for solving this question ABCD is a trapezium in which AB || DC, BD is a diagonal and E is the mid-point of AD. A line is drawn through E parallel to AB intersecting BC at F (see Fig. 8.30). Show that F is the mid-point of BC.

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  1. Given that,

    ABCD is a trapezium in which AB || DC, BD is a diagonal and E is the mid-point of AD.

    To prove,

    F is the mid-point of BC.

    Proof,

    BD intersected EF at G.

    In ΔBAD,

    E is the mid point of AD and also EG || AB.

    Thus, G is the mid point of BD (Converse of mid point theorem)

    Now,

    In ΔBDC,

    G is the mid point of BD and also GF || AB || DC.

    Thus, F is the mid point of BC (Converse of mid point theorem)

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