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Triangle ABC is isoceles and has a perimeter of 20cm.Sides AB and AC are each twice as long as BC. Calculate the length of the side BC

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Answer:

length of the side BC=4

Step-by-step explanation:

length of the side BC = x

length of the side AB = 2x

length of the side AC = 2x

x + 2x + 2x = 20

5x=20

x=4

      BC = 4

AB=8

AC=8

  8+8+4=20

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