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Question

In an equilateral triangle ABC; points P, Q and R are taken on the sides AB, BC and CA respectively such that AP = BQ = CR. Hence triangle PQR is equilateral.
State whether the above statement is true or false.

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Solution

Given: ABC is an equilateral triangle. P, Q, R are points on AB, BC, CA respectively, such that
AP=BQ=CR
We know, AB=BC=CA
AP=BQ=CR
ABAP=BCBQ=CACR
BP=CQ=AR (I)
Now, In APR and PBQ
A=B=60
AP=BQ (Given)
BP=AR (From I)
Thus, APRBQP (SAS rule)
Hence, PQ=PR (By cpct)...(II)
Similarly, APRCRQ
hence, PR=QR ..(III)
thus, from II and III
PQ=QR=PR
PQR is an equilateral triangle.

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