To find the value of \( y \) in the triangle you described, we can apply some basic principles of geometry and the properties of triangles.
Based on your description, it seems that you have a triangle in which:
- One angle at the right corner is \( 35^\circ \).
- Another angle at the left corner is \( 40^\circ \).
- The angle at the top of the triangle is \( y \).
According to the Angle Sum Property of triangles, the sum of the angles in any triangle is always \( 180^\circ \). Therefore, we can set up the following equation:
\[ y + 35^\circ + 40^\circ = 180^\circ \]
Now, combine the known angles:
\[ y + 75^\circ = 180^\circ \]
Next, subtract \( 75^\circ \) from both sides to solve for \( y \):
\[ y = 180^\circ - 75^\circ \]
\[ y = 105^\circ \]
Therefore, the value of \( y \) is \( 105^\circ \).