Liugang hotel

From: square+B-A =△ABC, the area of △ABC is S=25+6=3 1, the bottom of △ABC is AB=5cm, if FC=h cm, the height of BC =(5+h)cm, then 5 (5+H)/2 = 365433.

Triangle is a closed figure composed of three line segments on the same plane but not on the same straight line, which has applications in mathematics and architecture.

Ordinary triangles are divided into ordinary triangles (three sides are unequal) and isosceles triangles (isosceles triangles with unequal waist and bottom and isosceles triangles with equal waist and bottom, that is, equilateral triangles); According to the angle, there are right triangle, acute triangle and obtuse triangle, among which acute triangle and obtuse triangle are collectively called oblique triangle.

Judge:

1, three sides corresponding to two triangles are equal, and two triangles are congruent, which is called "side" or "SSS" for short.

2. The two sides corresponding to two triangles and their included angles are equal, and the two triangles are congruent, referred to as "corner edge" or "SAS" for short.

3. The two angles and sides corresponding to two triangles are equal, and the two triangles are congruent, which is called "angle" or "ASA" for short.

4. The two angles corresponding to two triangles are equal to the opposite sides of an angle, and the two triangles are congruent, which is called "corner edge" or "AAS" for short.

5. One hypotenuse and one right-angled side corresponding to two right-angled triangles are equal, and the two right-angled triangles are congruent, which is called "hypotenuse, right-angled side" or "HL" for short.