From a point `P`, `10cm` away from the centre of a circle, a tangent `PT` of length `8cm` is drawn. Find the radius of the circle.

Explanation

To solve the problem, we will use the Pythagorean theorem. Let's break down the solution step by step:

### Step 1: Understand the Geometry
We have a circle with center O, a point P outside the circle, and a tangent PT drawn from point P to the circle. The length of the tangent PT is given as 8 cm, and the distance OP from point P to the center O is given as 10 cm. We need to find the radius OT of the circle.

### Step 2: Identify the Right Triangle
In triangle OTP, we can identify:
- OP as the hypotenuse (10 cm)
...