What is the Tri Vertical Model? Features of the first line three vertical model

The three-vertical model speaks of the following 3 cases, as follows:

The proof is as follows: <>

Characteristics of the first-line three-vertical model: three-vertical, eight-figure, butterfly, A-line, dovetail, wiring harness. For example, if you see the midpoint, there are five test points, double the length of the midline, and the hypotenuse of the midlineThree-in-one, median travertine line,Center of gravity theoremof 1:

Conditions: ACD BEC.

Conclusions: 1) DCE is an isosceles right-angled triangle positive vibrator.

2)ab=ad+be。

Vertical. Refers to the intersection of one line and another line at right angles, and the two straight lines are perpendicular to each other. It is usually indicated by the symbol " ".

There are two vectors a and b, and the sufficient and necessary conditions of a b.

is a·b=0, i.e. (x1x2+y1y2)=0.

For solid geometry.

The vertical problem mainly involves the perpendicular problem of the line and the perpendicular of the surface.

problems, and the difficulty in solving the related problems is the definition of the line-plane perpendicular answer and its understanding of the conditions for determining the validity of the theorem; The determination theorem of perpendicular two planes and its application and dihedral angle.

Understanding of the concepts.

1. AAS, that is, the corner edge determination theorem. The explanation in the pre-fissure textbook is: two angles and the opposite side of one of the angles correspond to two equal triangles congruence;

2. SAS, that is, the corner edge determination theorem. Two sides and two triangles with equal angles to their sides are congruent;

3. SSS, that is, the trilateral judgment of Dinghui Suili. Two triangles with equal sides are congruent;

4. ASA, that is, the principle of corner and corner judgment. Two triangles of the source type are congruent with two angles equal to the side around which they are enclosed;

Hello classmates, an example of how the three-vertical model solves a problem in life is as follows: How to reduce waste? Step 1:

Reduced hands to reduce the cost of the town. Take action-saving actions, such as better shopping strategies, buying different quality items, and saving on food and everyday items. Step 2:

Increase reuse. Go online to find nearby supplies** and reuse projects, work with them, and try to get what you need from supplies** or reuse. Step 3:

Learn about sustainability. Participate in activities related to environmental protection, learn the principles of sustainable development, and engage in social action to promote discussions or practices on sustainable development. Hope the above answers are helpful to you

As shown below: The three-perpendicular model speaks of the following 3 cases:

The proof is as follows: <>

1. AAS, that is, the corner edge determination theorem. The boring explanation in the textbook is that two angles and the opposite side of one of the angles correspond to two equal triangle congruence; Friends bend.

2. SAS, that is, the corner edge determines the dust boy theorem. Two sides and two triangles with equal angles to their sides are congruent;

3. SSS, i.e., the trilateral determination theorem. Two triangles with equal sides are congruent;

4. ASA, that is, the principle of corner and corner judgment. Two triangles with two angles equal to the side around which they are enclosed are congruent;