In the figure above, x || y. What is the value of a ?
A. b + c
B. 2b - c
C. 180 - b + c
D. 180 - b - c
Answer:D
In the figure above, x || y. What is the value of a ?
A. b + c B. 2b - c C. 180 - b + c D. 180 - b - c
Explanation: D Don't forget that you can plug in numbers on geometry questions. Let's make b = 70° and a = 30°. So the third angle in the triangle is 80°. You know that c would be 80°, because it is opposite an 80° angle. Your target answer is a = 30°, so plug in 80° and 70° to find it. The only possible answer is (D).