write the definition, parts and all properties of triangles.
Answers
Answer: A triangle is a closed figure made up of three line segments.
There are three types of triangles based on sides and three based on angles.
Types of triangles based on sides
Equilateral triangle: A triangle having all the three sides of equal length is an equilateral triangle.
equilateral triangle
Since all sides are equal, all angles are equal too.
Isosceles triangle: A triangle having two sides of equal length is an Isosceles triangle.
isosceles triangle
The two angles opposite to the equal sides are equal.
Scalene triangle: A triangle having three sides of different lengths is called a scalene triangle.
Types of triangles based on angles
Acute-angled triangle: A triangle whose all angles are acute is called an acute-angled triangle
Obtuse-angled triangle: A triangle whose one angle is obtuse is an obtuse-angled triangle or Obtuse triangle
Right-angled triangle: A triangle whose one angle is a right-angle is a Right-angled triangle or Right triangle