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A weight reading on a scale shows the upward force exerted by the scale?
Scales are intended to measure some downward force acting on the scale, which is the weight of the object placed on the scale to be weighed, but it is also true that the downward force is necessarily balanced by an equal and opposite upward force, otherwise the scale would be forced downward (which would be very awkward since it would break through the floor and create quite a mess).
What angle is a door?
From what? It's 90 degrees from the floor, and its angle from the wall varies during use.
A wall is perpendicular to a floor what is the size of the angle formed between the wall and the floor?
90 degrees
What is the angle of a fire cut of a floor joist?
30 degrees
Real world example for right angle?
Several examples may be found in the privacy of your own bedroom . . . -- the angle between any two adjacent walls -- the angle between the floor and any wall -- the angle between the ceiling and any wall -- the angle between the floor and any leg of the bed -- the angle between any leg of the bed and the bed-frame
