Triangle Calculator

Calculate the various properties of triangle for given values.

Perimeter of a triangle

triangle

Area of triangle:

[ l×b/2 ]

Perimeter of Triangle:

[ (a + b + c) ]

Area of Equilateral Triangle:

[ (Sqrt(3)/4)×(side)² ]

triangle

Area of Triangle SAS(2sides & opposite angle):

[ ½×a×b×SinC ]

Type of triangles with definition

Triangle Type	Definition
Equiangular triangle	The triangle which has all three interior angles equal having every angle equals to 60°, because always the sum of all three interior angles are 180°. The equiangular triangle has all three sides in same length (congruent).
Equilateral triangle	The triangle which has all three sides equal in length and also having every interior angle equals to 60°, because always the sum of all three interior angles are 180°.
Right triangles	The triangle which has one right angle (90 degrees) out of its interior angles.
Obtuse triangle	The triangle which has one angle > 90 degrees out of its interior angles.
Acute triangle	The triangle which has all the interior angles < 90 degrees.
Scalene triangles	The triangle where every side has different length. The randomly drawn triangles having all three different interior-angles called scalene triangle. The triangle is scalene if all the sides has different lengths or all three angles are different.
Isosceles triangles	The triangle where two sides has same length. The isosceles triangle also has two interior-angles of same degree. In the case of isosceles triangle we can find the other two interior angle if one interior angle is given.