Learn Class 7 Math - The Triangle and its Properties

Triangle is a three-figure term that is a closed figure.

It consists of three sides, angles, and vertices. We can see that triangles are of different types. All these types of triangles vary from one another.

Types of the triangle

• Right angle triangle

  The triangle forms an angle of 90 degrees.

• Isosceles angle triangle

  It is a type of triangle whose two sides are equal.

• Equilateral triangle

  It is a triangle whose all the given sides are equal.

Properties of the triangle

• Sum of Angle property

  The angle sum property of a triangle includes that the whole angle sum of the triangle is equal to 180 degrees.

• Exterior angle property

  The exterior angle property of the triangle states that it is always equal to the opposite interior angle.

• Pythagoras theorem

  This triangle property includes the three things, i.e., Hypotenuse, Perpendicular, and Base. And it is represented as H^2 = P^2 + B^2.

Properties of an equilateral triangle

• The property of an equilateral triangle states that all sides are equal.
• And each angle of the equilateral triangle is equal to 60°.

Properties of an isosceles triangle

• This property states that the two sides of the triangle are always equal.
• And one side always differs in size from the other sides.