Question

Triangle abc and triangle def are similar length of bc=4cm and ef=5cm the perimeter of triangle abc =80cm square the find the perimeter of triangle def

Answer 1

Answer:

ar ( ABC) / ar ( DEF) = BC ,EF . (by theorem)

80 ar (DEF) = 4/5

ar (DEF) = 80*5/4

ar (DEF) = 100 cm sq.