数学全等三角形(国外英文资料).docVIP

数学全等三角形(国外英文资料) Congruent triangles (1) the shapes and sizes of the same figures put together can be completely coincident. The two graphs that can be completely coincident are called congruent forms (2) the two triangles that are completely coincident are called congruent triangles (3) overlap two congruent triangles into one. The vertex of the coincidence is called the corresponding vertex. The called side is called the corresponding edge (4) congruent triangles: equal sides of congruent triangles are equal; congruent angles of congruent triangles are equal (5) two equal triangles equal to three sides (SSS or side, side, side) (6) both sides and their angles are equal to two equal triangles (SAS or sides, angles, sides) (7) two triangles congruent corners and their edges corresponding to the equal (ASA or angular corners). (8) two angles equal to one of the two triangles of equal angles (AAS or angles, angles, sides) (9) the two sides of the right angled triangle corresponding to the same right angle are equal (HL or bevel, right angle side) Axis symmetry (1) the character of an angular bisector: the distance between the points on the bisector of the bisector and the sides of the angle is equal (2) by using the congruence of triangles, we can obtain that the distance between the angles of the interior of the horn and the angles of the two sides is equal to the bisector of the angle (3) as the window, if a graph along a straight line straight line on both sides of the folding part can coincide with each other, this figure is called the axis of symmetry, this line is the axis of symmetry. (4) like this, a graphic folded along a straight line, if it can be with another graphic coincide, then said that the two figures on the line of symmetry, this line is called the axis of symmetry, point after folding the corresponding points, called symmetry points. (5) the straight line passing through the middle of the line and perpendicular to the line is called the vertical bi