Respuesta :
Answer:
155 cm
Step-by-step explanation:
so just pretend the old lengths of the triangle were 9,10,12
then multiply them by 5
so the lengths are 45,50,60
therefore the new perimeter is 155 cm
Answer:
155 cm
Step-by-step explanation:
so just pretend the old lengths of the triangle were 9,10,12
then multiply them by 5
so the lengths are 45,50,60
therefore the new perimeter is 155 cm