Solve this i dont no how. im good at english how do you fail english if you speak the language

Acollege is planning to construct a rectangular parking lot on land bordered on one side by a highway. the plan is to use 680 feet of fencing to fence off the other three sides. what dimensions should the lot have if the enclosed area is to be a maximum?

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

What is the difference between regular convex and concave polygons