Question

If the perimeter of a triangle is (5x + 12) cm and its two sides are (x + 3) cm and (2x + 6) cm, find out the
third side
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Answer 1

Answer:

2x+3y

Step-by-step explanation:

Perimeter of triangle = sum of three sides

Let the third side be y

5x+12 = x+3+2x+6 + (y)

5x+12 = 3x+9 + (y)

2x+3 = y

The value of third side will be 2x+3y