How to draw the auxiliary line of mathematical geometry proof in junior high school Do you have any skills?
Triangle: for height, use the midline folding method or midline \x0d\ trapezoid: for height, translate waist, translate diagonal, extend the intersection of two waists at a point \x0d\ square, diamond, parallelogram: connect diagonal, and translate or rotate small figures in it, and make a vertical line \x0d\ circle: connect radius, connect diameter, meet tangent or chord.