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The image presents a geometric problem asking for the value of angle \( s \) given two other angles, \( 78^\circ \) and \( 50^\circ \), that form a straight line when combined with \( s \).

Since the angles on a straight line sum up to \( 180^\circ \), we can find \( s \) by subtracting the sum of the other two angles from 180°.

Here’s the equation:
\[
s + 78^\circ + 50^\circ = 180^\circ
\]

First, sum the known angles:
\[
78^\circ + 50^\circ = 128^\circ
\]

Now, subtract this from 180° to find \( s \):
\[
s = 180^\circ - 128^\circ = 52^\circ
\]

Thus, the value of \( s \) is \( 52^\circ \).

Would you like further clarification or details? Here are some related questions:

1. What is the sum of all angles on a straight line?
2. How can we classify angles based on their degree measurements?
3. What is the difference between complementary and supplementary angles?
4. How would this problem change if the given angle was obtuse instead of acute?
5. Can this method be applied to angles on a non-straight line (e.g., in a polygon)?

**Tip:** Always remember that the sum of angles forming a straight line is \( 180^\circ \).

What is the value of s, given the angles 78° and 50°?

Learn how to solve a geometric problem involving finding the value of angle s, given two other angles of 78° and 50° on a straight line. This solution covers the key geometric concept of angle sum properties, with a step-by-step approach suitable for Grades 6-8.

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