What is the formula of isosceles?

What is the formula of isosceles?

The formula for the area of a right angled isosceles triangle = ½×a² (where a is the length of the equal sides) Given that 10 cm is the length of the equal sides. Let 10 cm = a. Therefore area of the triangle = ½×a² = ½×10² = ½×10×10 = ½×100 = 50 cm.

How do you find the missing side of an isosceles triangle?

To find an unknown side of a triangle, you must know the length of other two sides and/or the altitude. To find the unknown base of an isosceles triangle, using the following formula: 2 * sqrt(L^2 – A^2), where L is the length of the other two legs and A is the altitude of the triangle.