I thought this one was a doosey if you don't know the rules to triangles very well. Tell me what you think.
Two similar triangles have areas in the ratio of 9:1. What is the ratio of these triangles' perimeters?
3:1. Just remember the following formula:
Area of triangle A/Area of triangle B = Square of side a/Square of side b.
You can use this formula to answer questions asked on either end (sides or areas)