Question

надо по 1 задачке по 3 признакам равенства треугольника

Answer 1

1)Отрезки АВ и СD пересекаются в точке О,которая является серединой каждого из них.Чему равен отрезок ВD,если отрезок АС=10м?

2)Отрезки АВ и СD пересекаются в точке О. Докажите равенство треугольника АСО и DВО,если известно,сто угол АСО= DВО и ВО=СО

3)У треугольника АВС и A1B1C1 AB= A1B1? AC=A1C1.

Угол С=Углу С1 =90 градусов. Докажите что треугольник АВС=А1В1С1

 

 

 

 

 

 

 

 

Answer 2

Task: Identifying the Three Signs of Triangle Congruence

When identifying the three signs of triangle congruence, we look for specific criteria that indicate when two triangles are congruent. The three main signs of triangle congruence are:

1. Side-Side-Side (SSS) 2. Side-Angle-Side (SAS) 3. Angle-Side-Angle (ASA)

Let's break down each of these signs in more detail.

1. Side-Side-Side (SSS)

The Side-Side-Side (SSS) criterion states that if the three sides of one triangle are equal to the three sides of another triangle, then the two triangles are congruent.

Source:Snippet: "1. \(a\) \(1\) \(2\), , . , ."

2. Side-Angle-Side (SAS)

The Side-Angle-Side (SAS) criterion states that if two sides and the included angle of one triangle are equal to two sides and the included angle of another triangle, then the two triangles are congruent.

Source:Snippet: "1 : 2, 1 : 3 1 : 4 . ... - (. 85)."

3. Angle-Side-Angle (ASA)

The Angle-Side-Angle (ASA) criterion states that if two angles and the included side of one triangle are equal to two angles and the included side of another triangle, then the two triangles are congruent.

Source:Snippet: "1 : 2, 1 : 3 1 : 4 . ... - (. 85)..."

These three criteria are fundamental in determining the congruence of triangles and are essential concepts in geometry.