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Thus, the area of an isosceles triangle means the total space enclosed by an isosceles triangle. The area of a figure is the region enclosed by the figure. ⇒ Area = (a + b/2 − a) × √Īrea of isosceles triangle = b/2 × √(a 2 − b 2/4) square unitsįAQs on Area of an Isosceles Triangle What Does the Area of an Isosceles Triangle Mean? Here, s is half of the perimeter of the triangle, and hence, it is called semi-perimeter. We know that the perimeter of a triangle with sides a, b, and c is a + b + c.

s is the semi perimeter of the triangle.

a, b, and c are the sides of the triangle.

The Heron's formula to find the area, A of a triangle whose sides are a,b, and c is: Heron's formula is used to find the area of a triangle when the measurements of its 3 sides are given. The area of an isosceles triangle formula can be easily derived using Heron’s formula as explained in the following steps.

β = measure of the angle opposite to the base.

α = measure of equal angles of the isosceles triangle.

a = measure of equal sides of the isosceles triangle.

Length of 2 sides and an angle between them.

Known Parameters of Given Isosceles Triangleįormula to Calculate Area (in square units) The following table summarizes different formulas that can be used to calculate the area of an isosceles triangle, for a different set of known parameters. The general basic formula that can be used to calculate the area of an isosceles triangle using height is given as, (1/2) × Base × Height

The area of an isosceles triangle can be calculated in many ways based on the known elements of the isosceles triangle. The area of an isosceles triangle refers to the total space covered by the shape in 2-D. Isosceles Triangle Area Using Trigonometry(SAS and ASA) Isosceles Triangle Area Using Heron’s Formula

Let us understand the area of the isosceles triangle in detail in the following section. Scalene Triangle- A triangle with all unequal sides.Isosceles Triangle- A triangle with any two sides/angles equal.Equilateral Triangle- A triangle with all sides equal.These different types based on sides are given below: Besides the general area of the isosceles triangle formula, which is equal to half the product of the base and height of the triangle, different formulas are used to calculate the area of triangles, depending upon their classification based on sides. The area of an isosceles triangle is the amount of space enclosed between the sides of the triangle.