Step-by-step explanation:
Assume that two lines x and y are perpendicular to the line z.
+) x intersects z at point A => Angle A1 = 90°
+) y intersects z at point B => Angle B1 = 90°
As it can be seen from the figure that Angle A1 and Angle B1 are corresponding angles and they are congruent.
According to the corresponding angle theorem, when two parallel lines are cut by a transversal, the pair of corresponding angles are congruent and vice versa, when two lines are cut by the same line and the pair of corresponding angles are congruent, they are parallel.
=> x and y are parallel.
I got 11.5
Hope this helps
Answer:
last one is the answer brother
Answer:
C. 73
Step-by-step explanation:
Triangles add up to 180 degrees.
180-90(right angle)-17 = 73 degrees
73<90 so it is acute.
Answer:
Cylinder. The explanation is not very exact, more intuition and whatnot, so let me know if there was anything you did not understand.
Step-by-step explanation:
This is assuming the rectangle has its sides parallel with the x and y axes.
Let's try to eliminate them one by one. A cone does not seem likely since it has slanted sides, and spinning the two straight sides will keep the sides straight. This can be used for the pyramid as well. Let me know if this doesn't make sense though.
Now for me I would imagine that rectangle being a sheet of paper, or metal. if you set that sheet atop some dirt or something and then rotated it, what shape would be drawn into the material? It would be a circle. So we know the 3d shapewill have a base of a circle, which leaves us with a cylinder. Again, let me know if this method did not make sense.
