### Some articles on *inradius*:

Tangential Quadrilateral -

... The

**Inradius**... The

**inradius**in a tangential quadrilateral with consecutive sides a, b, c, d is given by where K is the area of the quadrilateral and s is its semiperimeter ... quadrilateral with given sides, the**inradius**is maximum when the quadrilateral is also cyclic (and hence a bicentric quadrilateral) ... of the tangent lengths, the incircle has radius The**inradius**can also be expressed in terms of the distances from the incenter I to the vertices of the tangential quadrilateral ABCD ...Malfatti Circles - Radius Formula

... a, b, and c of the triangle, the

... a, b, and c of the triangle, the

**inradius**r, the semiperimeter, and the three distances d, e, and f from the incenter of the triangle to the vertices opposite sides a, b, and c respectively ... triangle with side lengths 28392, 21000, and 25872 has**inradius**6930 and Malfatti radii 3969, 4900, and 4356 ... As another example, the triangle with side lengths 152460, 165000, and 190740 has**inradius**47520 and Malfatti radii 27225, 30976, and 32400 ...Further Formulas For General Euclidean Triangles

... The following formulas involve the circumradius R and the

... The following formulas involve the circumradius R and the

**inradius**r where ha etc ... from the circumcenter to the three sides equals the sum of the circumradius and the**inradius**... where R is the circumradius and r is the**inradius**...