∆ABC ~ ∆DEF. If AB = 4 cm, BC = 3.5 cm, CA = 2.5 cm and DF = 7.5 cm, find the perimeter of ∆DEF.
please help me with this question this is simple question for class 10th CBSE board Similarity Chapter 6
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Because triangle ABC ∼ triangle DEF
∴ perimeter of triangle ABC : perimeter of triangle DEF = AC : DF
Perimeter of triangle ABC = 4+3.5+2.5 = 10cm
10 : perimeter of triangle DEF = 2.5 : 7.5
Perimeter of triangle DEF = 10× 7.5/2.5
∴ perimeter of triangle DEF = 30cm