Question

I don't know how to find the value of x for geometry isoceles and equilateral triangles.

Answer 1

Given data:

The given isosceles triangle.

In an isoscels triangle 2 angles are always equal, the expression for sum of all the angles in atriangle is,

`\begin{gathered} 120^(\circ)+x+x=180^(\circ) \\ 2x=60^(\circ) \\ x=30^(\circ) \end{gathered}`

Thus, the value of x is 30 degrees.