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What do you mean by face left and face right observations?
Face left observation(In theodolite survey):If the face of the vertical circle is to the left of the observer, the observation of the angle is known as Face left observationFace Right observation(In theodolite survey):If the face of the vertical circle is to te right of the observer, the observation of the angle is known as Face right observation
What is the angle between two diagonals on the face of a cube?
The 2 diagonals bi-sect each other at right angles which is 90 degrees
What are a face an edge and a vertex?
A face is the flat surface of an object (2 or 3 dimensional). An edge is when two sides (faces) meet on an object. A vertex is the corner of an object, where an angle exists between two or more lines.
To measure a horizontal angle by reiteration method?
This method is used if there are more than one angles to be measure from a certain station point. Consider the following fiqure, we will measure angles AOB and BOC using this method.ProcedureSetup the theodolite at station O, bisect the point A with a certain circle reading with face left.Rotate the instrument in clockwise direction and bisect B, note the circle reading.Then rotate and the telescope till it bisect the point C, note this circle reading also. All these reading will book into face left position.Transit the telescope and rotate the instrument through 180°, this time bisect the point C firstly and then rotate telescope in anti clockwise direction towards B and then ultimately towards A. Put these readings in face right position.You can do more than one sets of measurements for the accurate results, i have done one set and booking method is as follows,Inst. StationStn. SightedFaceCircle reading(° ′ ″)Mean of faces(′ ″)Angle value(° ′ ″)OAL10 20 5020 60AOB37 10 05 R190 20 07BL47 30 1030 11R227 30 12BOC41 10 14CL88 40 2040 25R268 40 30
How angle described by minute hand in 60 minute?
In 60 minutes, the minute hand completely circumnavigates the face of the clock,and returns to where it was 60 minutes earlier. That's a travel of 360 degrees.
