👉 In mathematics, the "inter-radius" is a special type of radius that is used to define a circle in geometry. It is also known as the "minor radius" or "inner radius". The inter-radius is defined by the formula: \[ r_{\text{inter}} = \frac{\pi}{2} - r \] where \(r\) is the outer radius and \(r_{\text{inter}}\) is the inter-radius. This formula shows that the inter-radius is
