Question

What is the formula of perimeter in isosceles right angled triangle

Answer 1

Answer:

$\huge\underline\bold\red{AnswEr}$

If you are given one interior angle of an isosceles triangle you can find the other two. For example, We are given the angle at the apex as shown on the right of 40°. We know that the interior angles of all triangles add to 180°. So the two base angles must add up to 180-40, or 140°