SAT Math Multiple Choice Practice Question 438: Answer and Explanation
In the figure above, what is the value of a + b + c ?
E. It cannot be determined from the information given.
Correct Answer: C
C The number of degrees in a line is 180. Therefore, b + c = 180. And since a + 90 = 180, a = 90. So a + b + c = 270. Note that E is the Joe Bloggs choice—"it cannot be determined" is rarely the correct answer.