Answer: The perimeter of triangle MNO is 20.
Step-by-step explanation:
- Find the scale factor between the two triangles by dividing 6 by 9 (yellow side), or 4 by 6 (pink side). Either way, you get the result 2/3. So 2/3 is the scale factor.
- Multiply 15 (green side of triangle JKL) by the established scale factor to get 10, which is equal to x.
- Add 4, 6, and 10 together to get 20. This is the perimeter of MNO, as you find the perimeter of a triangle by adding the lengths of all of its sides together.