Answer: I do not understand the options you gave but but cos30º is equal to 
/2 which is 0.86602540378.
I can’t answer because I don’t have the picture of the triangle
Answer:
C. m∠x + m∠y = 180
Step-by-step explanation:
The two straight line in the diagram intersect each other to form two pairs of vertical angles. These are <x and <z, and <y and w.
The only statement from the given options that is true is m∠x + m∠y = 180.
This is because they are angles in a straight line. The sun of angles in a straight line is 180°.
What do you need help in??
