Question
Jack used 3 stretchable bands to form the sides of triangle DEF where DE = 8 cm, EF = f cm and DF = 3f cm. David stretches two of the elastic bands and enlarges triangle DEF. The sides EF and DF are stretched to 4 times its original length. What is the perimeter of the stretched triangle DEF?
2 m

Click button first when a symbol is required. X

Jack used 3 stretchable bands to form the sides of triangle DEF where DE = 8 cm, EF = f cm and DF = 3f cm. David stretches two of the elastic bands and enlarges triangle DEF. The sides EF and DF are stretched to 4 times its original length. What is the perimeter of the stretched triangle DEF?