what different is "get a handle on" and " make out" and " figure out"？

Question

Answer

三个词讲述三个意思 分别是讲 已完成 目的 以及过程
Three words describe three meanings, which are about the completed purpose and the process.

Answer

Make out is about the same as figuring out. 
Get a handle on is to find control over a subject matter or situation.

Also, as a slang, make out, can mean to kiss someone more than once in the same period of time.