SAT Math Multiple Choice Practice Question 4: Answer and Explanation

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Question: 4


What are the coordinates of point A in the diagram above?

A. (0, 10)
B. (5, 0)
D. (10, 0)

Correct Answer: C


C. This question is the first of many appearances of the 30-60-90 triangle on these practice exams. In this type of triangle, the length of the hypotenuse is always twice the length of the shorter leg, while the longer leg's length equals the shorter leg's length times . Because you know the shorter leg equals 5, you know that the longer leg is , and so the coordinates are .

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