Isosceles Triangle can be defined as a type of triangle that has two equal sides and the angles that are found the opposite to these equal sides are also equal. Thus, the perimeter of the given isosceles triangle is 25 cm. Perimeter of the isosceles triangle = 2 x 10 + 5 = 20 + 5 = 25 cm. Here, the length of equal sides is 10 cm and the base is given as 5 cm. Solution: To calculate the perimeter of an isosceles triangle, we will use the perimeter formula: Here ‘a’ is the two equal sides’ length of an isosceles triangle and ‘b’ is the base of that triangle.Įxample: Calculate the perimeter of an isosceles triangle whose equal sides are 10 cm and the base is given as 5 cm. The perimeter of an isosceles triangle’s formula is as follows: The formula for the perimeter of an isosceles triangle is given by: The perimeter of an isosceles triangle can be measured if its base and side are available. In the same way, the perimeter of an isosceles triangle is measured as the sum of all three sides of an isosceles triangle. The perimeter of any kind of shape is calculated by measuring the total boundary of that shape. Therefore, the isosceles obtuse triangle is a triangle consisting of two equal sides with an obtuse angle. The obtuse triangle can be of two main types, that are, scalene triangles or isosceles triangles. Also, it is impossible to draw a triangle consisting of more than two obtuse angles. Let’s assume that the sides of the right isosceles triangle are a, a, and h, where a is the length of two equal sides and h is the length of the hypotenuse, then h = √(a 2+a 2) = √2a 2= a√2 or h = √2aĪn obtuse triangle is a triangle where one angle is larger than 90 degrees. 
Therefore, the Pythagoras theorem can be applied here, where the square of the hypotenuse is equal to the sum of the square of base and perpendicular.
The third unequal side is called the hypotenuse. The isosceles triangle is known as an Isosceles acute triangle if the angles opposite to the equal legs are equal and are lower than 90 degrees.Ī right isosceles triangle consists of two equal sides, in which one equal side is the perpendicular and another one is the base of the triangle. An Isosceles triangle can be classified as either acute, right or obtuse depending upon the angle between the two legs. The axis of symmetry of an isosceles triangle is found along its base’s perpendicular bisector. The Isosceles acute triangle, the Isosceles right triangle and the Isosceles obtuse triangle.Īs we are aware of the fact that the various dimensions of a triangle are base, legs, and height. An isosceles triangle can be generally classified into different types, such as.The remaining unequal angle of a right isosceles triangle is equal to 90 degrees.An Isosceles triangle’s height is taken from the base of the triangle to the vertex of the triangle.The angles that are opposite to the two equal sides, will also be equal.Any of the two sides are equal in an isosceles triangle, and the unequal side is known as the triangle’s base.Here are some of the important properties of an isosceles triangle: It can be defined as a triangle with two equal sides. An isosceles triangle is a type of a triangle along with equilateral triangle and scalene triangle.
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