Explanation for Question 32 From the Math (Calc) Section on the Official Sat Practice Test 10
Now for question number 32, we're told that in the triangle above a is 2 34. So this is 34 and we want to know the value of B 3 and C. Right? So this question, 4 the only real outside knowledge that you need to know is that the sum 5 of all the angles in a triangle, 6 that's going to be equal to 180 degrees, 7 180 degrees. So if I did a plus B plus C, 8 that would all have to add up to 180 degrees, 9 right? So we have that equation there. And then we're told that a is 10 34, right? So it's really 34 plus, 11 and we're looking for B plus C as a whole. 12 We want B plus C. So I'm going to put the two of those 13 in parentheses as I rewrite this equation. 14 And I'm simply going to solve for these parentheses, 15 right? And the way I can do that is by subtracting 34 from 16 both sides. And when I do that, 17 when I do 180 minus 34, 18 we get the B plus C, which is again, 19 what we want, even though it's not one variable, 20 it is what we're looking for. And that's equal to 146 making 21 our answer 146.