Geometry Calculator Menu

1. Geometry
   1. What kind of triangle?
   2. Perimeter
      1. Square
      2. Rectangle
      3. Regular Polygon
      4. Triangle
      5. Circumfrence of a circle
      6. Approximate Circumference of an Ellipse
   3. Height of
      1. Isosceles Triangle
      2. Scalene Triangle
      3. Rectangle or Square
      4. Circle
   4. Area
      1. Rectangle (Square too)
      2. Circle
      3. Triangle
         1. Triangle
         2. Heron (Hero) Formula
      4. Quadrilateral
         1. General Brahmagupta's Formula
         2. Brahmagupta's Formula (if inscribed in a circle)
         3. Bretschneider's Formula
      5. Parallelogram
      6. Trapezoid
      7. Regular Polygon
   5. Volume
      1. Cone
      2. Cube
      3. Pyramid
      4. Rectangular Prism
      5. Triangular Prism
      6. Sphere
      7. Conical Frustum
      8. Cylinder
      9. Ellipsoid
      10. Oblate Spheroid
      11. Prolate Spheroid
      12. Pyromidal Frustum
      13. Spherical Cap
      14. Spherical Segment
      15. Torus
   6. Surface Area
      1. Cube
      2. Cone
      3. Conical Frustum
      4. Oblate Spheroid
      5. Prolate Spheroid
      6. Sphere
      7. Torus
      8. Zone
      9. Cylinder
      10. Pyramid
      11. Spherical Lune
      12. General Prism
      13. Triangular Prism
      14. Rectangular Prism
   7. Regular Polygons
   8. Arc length