For example the square on hypotenuse of a right Angle triangle is equal to the sum of the squares of the other two sides.
例如，直角三角形斜边的平方，等于其它两边的平方和。
2
It is common sense that the sum of the Angle of triangle is 180 degree and the sum of any two sides of a triangle is greater than the third side.
三角形三个角之和是180度，三角形任意两边之和大于第三边，这些都是常识。
3
A method of digital calibration in the amplitude and phase imbalances of sum and difference channels, and of angle error normalization processing is provided.