The length of a tangent from a point A at distance 5 cm from the centre of the circle is 4 cm. Find the radius of the circle.

Explanation

To find the radius of the circle given the length of the tangent and the distance from the center, we can use the Pythagorean theorem. Here’s the step-by-step solution:

### Step 1: Understand the components of the problem
We have:
- Point A (external point) at a distance of 5 cm from the center O of the circle.
- Length of the tangent AP from point A to the point of contact P on the circle is 4 cm.

### Step 2: Identify the right triangle
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