The same case is with an equilateral triangle, all three sides are equal and if one side is equal to 'l' then their sum will be equal to. The overall equation will be because both lengths are added. That means we will have since the base of an isosceles triangle is always different. In an isosceles triangle, you know two sides are equal, let's say one side is equal to 'l'. A scalene triangle has all different sides, therefore, the formula remains the same, however, with equilateral and isosceles triangles, there is something different? Nothing is different, the concept is the same but with a twist. Equilateral TriangleĪbove is a comparison of all three triangles with their perimeter formulas. Formula of the perimeter of an isosceles triangle, P 2a + b Here, a (sides) 24 cm and b (base) 16 cm Therefore, perimeter of an isosceles triangle, P 2 (24) + 16 64 cm. Does this mean every triangle will have a different way to find its perimeters? Absolutely not! The concept will remain the same which is the addition of the three sides. This is the basic concept of the perimeter of a triangle but a triangle also has three types. There are three sides in a triangle and that means you need to add all three sides to find the perimeter. All you need to do is to add all the side lengths. Calculation of the perimeter of a triangle is very easy. Let's begin with something that you will a lot in your life and yes, that is the triangle. Let’s use this formula to find the area of the triangle below: A ½ base × height. If we have this information, we can use the following equation to determine the area: A ½ base × height. But the question is, what is an area of a polygon? The area of a polygon is the measure of the region enclosed by the sides of a polygon. It’s easiest to calculate the area when we know the length of the base and height. There is no easy way of finding the area, you will need to memorize some formulas for finding the area. The area is a region which a shape occupies. The area of an Isosceles Triangle is the amount of region enclosed by it. Where, b is the base of a triangle h is the height of the triangle 3.2. Finding the perimeter is easier but finding the area is a bit complex. For an Isosceles Triangle, along with two sides, two angles are also equal in measure. Right Triangle Area of a right triangle bh Perimeter of a right triangle a+b+c Pythagoras Theorem Hypotenuse.

Isosceles triangle area formula