Mathematics > Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
In the triangles above,
(A) 15
(B) 30
(C) 45
(D) 60
(E) 105
The Correct answer is C.
Explanation
To evaluate the expression 
, it is necessary to determine the values of 
and
. Since the sum of the measures of the angles of any triangle is 
degrees, and a right angle has measure 
degrees, the value of 
can be found by solving the equation 
. This yields 
. The value of 
can be found by solving the equation 
. This yields 
. Finally, the values for 
and 
are substituted into the expression 
to obtain 