TrianglesMohammed Naveed

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a plane figure with three straight sides and three angles.

What is Triangle

There are three special names given to triangles that tell how many sides (or angles) are equal.

Equilateral Isosceles Scalene

Types of Triangle

In geometry, an equilateral triangle is a triangle in which all three sides are equal. In traditional or Euclidean geometry, equilateral triangles are also equiangular; that is, all three internal angles are also congruent to each other and are each 60°.

Equilateral

In geometry, an isosceles triangle is a triangle that has two sides of equal length. Sometimes it is specified as having two and only two sides of equal length, and sometimes as having at least two sides of equal length, the latter version thus including the equilateral triangle as a special case.

Isosceles

A scalene triangle is a triangle that has three unequal sides, such as those illustrated above.

Scalene

What is an angle ? the space (usually measured in degrees)

between two intersecting lines or surfaces at or close to the point where they meet.

"in any triangle, the longest side is opposite the largest angle"

Angle

Right Angled Triangle : Obtuse Angled Triangle Acute Angled Triangle

Types of Angle in Triangle

Right angle triangle is a triangle with one of its angle exactly equal to 90°.As shown in the picture.

Right Angled Triangle

Obtuse angle triangle is a triangle with one of its angle greater than (>) 90°. As shown in the picture

Obtuse Angled Triangle

Acute angle triangle is a triangle with all three angle less than (<) 90°. As shown in the picture

Acute Angled Triangle