

Lets take perpendicular P = 3 cm and Base B = 4 cm. Using the above equation third side can be calculated if two sides are known.Įxample: Suppose two sides are given one of 3 cm and the other of 4 cm then find the third side. (Perpendicular) 2 + (Base) 2 = (Hypotenuse) 2 We know that the right-angled triangle follows Pythagoras TheoremĪccording to Pythagoras Theorem, the sum of squares of two sides is equal to the square of the third side. Lets assume that the triangle is Right Angled Triangle because to find a third side provided two sides are given is only possible in a right angled triangle. The hypotenuse is the longest side in such triangles.Įquilateral Triangle: An equilateral triangle is a triangle in which all the three sides are of equal size and all the angles of such triangles are also equal.įinding Third Side of a Triangle given Two Sides Right-angled Triangle: A right-angled triangle is one that follows the Pythagoras Theorem and one angle of such triangles is 90 degrees which is formed by the base and perpendicular. In this triangle, the two angles are also equal and the third angle is different. Isosceles Triangle: Isosceles Triangle is another type of triangle in which two sides are equal and the third side is unequal. All the angles of a scalene triangle are different from one another. Scalene Triangle: Scalene Triangle is a type of triangle in which all the sides are of different lengths. Types of Triangles based on line Properties Perimeter of a triangle is the sum of all three sides of the triangle.Ĥ. Sum of all the angles of triangles is 180°ģ. Each triangle has 3 sides and 3 angles.Ģ.
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