Angle between a tangent and the radius (or diameter) at the point of contact

The same question, asked 2 times: 24 Sep 2025 S3, 26 Sep 2025 S2. Every wording below, oldest first.

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Question 1
24 Sep 2025 S3
75 $A circle that has a diameter of 10 centimeters.. A line is tangent to the circle. What is the angle between the tangent and the diameter at the point of contact?$
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Question 2
26 Sep 2025 S2
75 $A tangent is drawn to a circle with a radius of 5 cm. At the point of tangency, what is the angle between the tangent and the radius?$
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