Mastering basics of geometry, points, lines and planes, segments, angles, bisectors, perimeter, circumference and areas, reasoning and proof, perpendicular and parallel line, congruent triangles, properties of triangles, parallelograms, rhombuses, rectangles, squares, trapezoids, polygons, quadrilaterals, transformations, similarities, right triangles and trigonometry, circles, area of polygons and circles, surface areas and volumes, vectors, similar triangles, similar polygons, proportions and similar triangles, Pythagorean theorem, special right triangle, trigonometric ratios, tangents, arcs, chords, circles, prisms, cylinders, pyramids, cones, volumes, areas, surface areas.