In the image you've uploaded, there are multiple triangles where the task is to find the missing angles. Each triangle has a different missing angle marked with a variable. The sum of angles in any triangle is always $180^\circ$. I'll calculate the missing angles one by one:

1. Top Left Triangle:

   • Given angles: $40^\circ$, $90^\circ$, missing angle: $a$.
   • Calculation: $a = 180^\circ - (40^\circ + 90^\circ) = 50^\circ$.

2. Top Middle Triangle:

   • Given angles: $26.3^\circ$, missing angle: $b$.
   • This triangle looks like a right triangle.
   • Calculation: $b = 180^\circ - (90^\circ + 26.3^\circ) = 63.7^\circ$.

3. Top Right Triangle:

   • Given angles: $61.8^\circ$, $75.2^\circ$, missing angle: $k$.
   • Calculation: $k = 180^\circ - (61.8^\circ + 75.2^\circ) = 43^\circ$.

4. Middle Left Triangle:

   • Given angles: $80.5^\circ$, missing angle: $v$.
   • Calculation: $v = 180^\circ - 80.5^\circ = 99.5^\circ$.

5. Middle Middle Triangle:

   • Given angles: $58^\circ$, $33.7^\circ$, missing angle: $e$.
   • Calculation: $e = 180^\circ - (58^\circ + 33.7^\circ) = 88.3^\circ$.

6. Middle Right Triangle:

   • Given angles: $92.6^\circ$, $61.7^\circ$, missing angle: $j$.
   • Calculation: $j = 180^\circ - (92.6^\circ + 61.7^\circ) = 25.7^\circ$.

7. Bottom Left Triangle:

   • Given angle: $42.4^\circ$, missing angle: $y$.
   • Calculation: $y = 180^\circ - 42.4^\circ = 137.6^\circ$.

Would you like details on how these calculations are performed or have any other questions?

Here are some related questions you might find interesting:

1. How can you tell if a triangle is a right triangle from its angles?
2. What properties do isosceles triangles have in relation to their angles?
3. Can a triangle have more than one angle of 90 degrees or more?
4. How does the Exterior Angle Theorem relate to these problems?
5. What is the significance of an angle summing up to 180 degrees in a triangle?

Tip: Remember, the sum of the interior angles of any triangle in Euclidean space will always be 180 degrees, which is a helpful check when solving these types of problems.