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15

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PAGE: 514SET: ExercisesPROBLEM: 15
Please look in your text book for this problem Statement

The perimeter of the triangle  inches.

The length of the each side is inches.

The perimeter P is the sum of the each side.

           (Substitute 49 for P)

                    (Add: )

     (Subtract 30 from each side)

              (Apply additive inverse property: )

                    (Apply additive identity property: )

                           (Subtract: )

The unknown side length is 19 inches.

The lengths of sides are 19, 12 and 18 inches. So, the triangle is Scalene triangle.



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