Does the four corners in geomantic omen refer to the building area or include the courtyard area?

Yin angle is a term in the construction industry, which refers to the concave angle on the wall, also called Yin angle, such as the four corners of a room house. Corresponding to it is the external angle, which refers to the angle protruding from the wall.

(1) The concave wall surface is the internal corner line.

② When the materials or colors of the wall and ceiling are different, there will be a clear dividing line. Covering this boundary with the shade line, you can choose wood line or plaster line according to different indoor styles, and it can also play a decorative role.

(3) With the prevalence of simplicity in the market, most people begin to decorate the inner corner line simply, and the non-functional feet gradually change from simplification to cancellation. Some interior designs abandon the inner corner line, even if the color difference between the wall and the top is great, they would rather leave a boundary line, but the line should be straight.

Yang angle is also an architectural term, which refers to the corner protruding from the wall, such as the four corners protruding from the outside of the building, and the angle between the door and window openings and the wall. Corresponding to it is the internal angle, which refers to the concave angle on the wall.

(1) The outward concavity of the wall is the external corner line.

② The external corner line is a common technical means in the decoration process. The 45-degree angle and the internal corner line have the same effect. They are plastic lines for corner joints, and the effect is acceptable.

③45-degree angle means that two 90-degree bricks are treated together, and each brick is polished to 45 degrees, which will look better together. Another function of the outer corner line is that its edge is not very easy to grind, which can still be distinguished.

The internal angle is not more than 180 degrees. The angle greater than 180 degrees is a positive angle, and the included angle between building components is a negative angle. For example, standing in our usual room, the angles between walls and ceilings, and between walls are all internal angles; So what's Yang Jiao? The external angle is the external angle of the included angle of the building. For example, the four corners of an independent rectangular column, the corner of the outer wall (but not the corner between two walls) are all positive angles.