Pada persegi ABCD, E dan F adalah titik-titik tengah AB dan CD. Garis AF dan CE memotong diagonal BD masing-masing di P dan Q. Buktikan 3PQ= BD.
In the square ABCD, E and F are midpoints of AB and CD respectively. Lines AF and CE meet diagonal BD in points P and Q respectively. Prove that 3PQ=BD.
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