getcalc.com's basic geometry and shapes calculators, formulas & examples to deal with length, area, surface, volume, points, lines, dimensions, angles & curves calculations of 2 or 3 dimensional (2D or 3D) geometric shapes. These calculators and associated instructions help learners, students, teachers or professionals to learn or teach how to execute such geometric calculations efficiently for the shapes of square, rectangle, circle, ellipse, arc, triangle, cube, cylinder, sphere, hemisphere, pyramid, prism, cone, line (mid-point, distance, slope), hyperbola, rhombus, trapezoid, polygon, and much more.