Question

The lengths of the sides of a triangle are 15cm, 20cm, 30cm. What are the lengths of the sides of a similar triangle that has a perimeter of 26cm?

Answer 1

second triangle:

a+b+c=26cm

those 3 nombers have 5 in common

so 3x+4x+6x=26(divided each by 5)

13x=26

x=2

so: 6+8+12=26cm. (plug the value of x)

any questions?