Multiple figures geometry questions are common on the GMAT. Make sure you recognize how the two shapes relate to each other by noting
When you see a 60 degree angle in a triangle, you should be thinking one of two possibilities: equilateral or 30-60-90 triangle. Once you spot the latter in this problem, the rest of solving just comes down to arithmetic. Be on the lookout for problem types that show up often on the GMAT!
In addition to testing your knowledge of difficult topics and challenging concepts, the GRE may also try to overwhelm you with an excess of information or complexity.
In the following question, what information is useful, and what is presented simply to distract you from the problem at hand?
Much of the information presented at the outset of this problem is unnecessary, and is presented simply as a means to confuse and overwhelm. Focus on the pertinent data in every problem, and don’t let an excess of information throw you off track!
Despite your best efforts, you will probably not be able to remember every single fact about every single possible algebra or geometry property in the universe for the GRE. The good news – it doesn’t matter!
Beyond the simplest properties, most relevant information can be derived from what you know. When solving the following problem, see if you can do it without knowing the formula for a trapezoid.
Even if you don’t have the formula for the area of a trapezoid memorized, you can still solve this problem, because a trapezoid is made up of a rectangle and two triangles (the formulae of which you DO definitely need to know). So if you come across a fact or figure on a test that you can’t calculate, don’t freak out – see if you can use what you already know to solve the problem!