Question 36
Triangles and QuadrilateralsIn the figure above, find the value of x.
- A.110°
- B.100°
- C.90°
- D.80°
Show the answer and explanation
Answer: C (90°)
Explanation
The two lines are parallel, so the co-interior angles 2y and 2z add to 180°, giving y + z = 90°. In the triangle containing x, x = 180° − (y + z) = 90°.