Question

Take three collinear points P, Q and R on a page of your notebook. Join
PQ QR and RP. Is this figure a triangle? If not, why?​

Answer 1

Answer:

no as they lin on the same line

Answer 2

as Points are collinear hence figure is not a triangle

Step-by-step explanation:

Take three collinear points P, Q and R

There can be three cases

Case 1 : P is in middle

Case 2 : Q is in middle

Case 3 : R is in middle

Case 1 :   QP + RP  = QP   ( hence sum of two side not greater than third side) so this can not be triangle

Case 2 :   PQ + QR  = PR   ( hence sum of two side not greater than third side) so this can not be triangle

Case 3 :   PR + RQ  = PQ   ( hence sum of two side not greater than third side) so this can not be triangle

as Points are collinear hence figure is not a triangle

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