Question

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what is the value of s? 40° s

Explanation:

Step1: Use the property of vertical angles and right - angle

Vertical angles are equal. And we know that the sum of angles around a point where there is a right - angle (90°) and given 40° angle is related to \(s\).
Since the sum of angles in a right - angle related part: \(s + 40^{\circ}=90^{\circ}\)

Step2: Solve for \(s\)

Subtract \(40^{\circ}\) from both sides of the equation \(s + 40^{\circ}=90^{\circ}\).
\(s=90^{\circ}-40^{\circ}\)

Answer:

\(50\)