Question
Michael used 3 stretchable bands to form the sides of triangle GHJ where GH = 7 cm, HJ = f cm and GJ = 3f cm. David stretches two of the elastic bands and enlarges triangle GHJ. The sides HJ and GJ are stretched to 2 times its original length. What is the perimeter of the stretched triangle GHJ?
2 m

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Michael used 3 stretchable bands to form the sides of triangle GHJ where GH = 7 cm, HJ = f cm and GJ = 3f cm. David stretches two of the elastic bands and enlarges triangle GHJ. The sides HJ and GJ are stretched to 2 times its original length. What is the perimeter of the stretched triangle GHJ?