Question

videos the properties of triangle to find the unknown angles​

Answer 1

Answer:

sum of the angle of the triangle is equal to 180 degree

Answer 2

Answer:

Properties of a triangle

The properties of a triangle are:

• A triangle has three sides, three angles, and three vertices.
• The sum of all internal angles of a triangle is always equal to 180°. This is called the angle sum property of a triangle.
• The sum of the length of any two sides of a triangle is greater than the length of the third side.
• The side opposite to the largest angle of a triangle is the largest side.
• Any exterior angle of the triangle is equal to the sum of its interior opposite angles. This is called the exterior angle property of a triangle.

Types of triangles

Triangles can be classified in 2 major ways:

1. Classification according to internal angles (Right, Acute, Oblique)
2. Classification according to the length of its sides (Equilateral, Isosceles, Scalene)

Let’s look into the six types of triangles in detail:

• Acute Angled Triangle
• Right-Angled Triangle
• Oblique Angled Triangle
• Scalene Angled Triangle
• Isosceles Angled Triangle
• Equilateral Angled triangle