  , , -  sides of a triangle - semiperimeter  - circumcenter

Calculate the radius of a inscribed circle of a triangle if given all three sides ( r  ) :   - equal sides of a triangle - circumcenter

Calculate the radius of a inscribed circle of an equilateral triangle if given side ( r  ) : 1.  Find radius of a circle inscribed if you know side and angle at the base  - equal sides of a triangle - side  (base) - angle  at the base - circumcenter

Calculate the radius of a circle inscribed in an isosceles triangle if given sides ( r  ) : Calculate the radius of a circle inscribed in an isosceles triangle if given side and angle ( r  ) :  2.  Find radius of a circle inscribed if you know side and height  - equal sides of a triangle - side  (base) - height - circumcenter

Calculate the radius of a circle inscribed in an isosceles triangle if given side and height ( r  ) :    , -  legs of a right triangle - hypotenuse - circumcenter

Calculate the radius of a inscribed circle of a right triangle if given legs and hypotenuse ( r  ) :   -  upper base -  lower base -  height of a trapezoid - circumcenter

Calculate the radius of a inscribed circle in an isosceles trapezoid if given height or bases ( r  ) :   -  side of a square - circumcenter

Calculate the radius of a inscribed circle of a square if given side ( r  ) : `1.  The radius of a circle inscribed in a rhombus if you know diagonal, side and angle.  `  , -  diagonals of a rhombus - side - acute angle of a rhombus - circumcenter

Calculate the radius of a inscribed circle of a rhombus if given diagonals ( r  ) : given side and angle ( r  ) : given diagonal and angle ( r  ) :  given diagonal and side ( r  ) :  `2.  The radius of a circle inscribed in a rhombus if you know height  `  -  height of a rhombus - side  of a rhombus - circumcenter

Formula for calculating radius of a inscribed circle of a rhombus if given height ( r  ) :   -  side  of a polygon -  number  of sides - circumcenter

Calculate the radius of a inscribed circle of a regular polygon if given side and number of sides ( r  ) :   - equal sides of a hexagon - circumcenter

Formula for calculating radius of a inscribed circle of a regular hexagon if given side ( r  ) : 