Answer:
[tex]x = 20\°[/tex]
Step-by-step explanation:
By definition we know that the sum of the internal angles of a triangle is always equal to 180 °
in this case we have a right triangle. We know that right triangles have an angle of 90 °.
So the sum of the three sides of this triangle must be equal to 180 °
So
[tex]2x + 10 + 2x + 90 = 180[/tex]
We solve the equation for the variable x.
[tex]4x +100 = 180\\4x = 180-100\\4x = 80[/tex]
[tex]x = 20\°[/tex]
