##### Learn Geometry from the best teachers we hand-picked for you. Experience the 'A-ha!' moment in every topic with entertaining teaching. Brian McCall

#### Geometry Building Blocks

Geometry building blocks reviews elementary concepts on the subject, including the definition of terms related to shapes like lines, angles, triangles, polygons, and circles. Topics include:

#### Reasoning, Diagonals, Angles and Parallel Lines

Reasoning, diagonals, angles and parallel lines covers applications of both inductive and deductive reasoning to geometry, as well as the definitions on angles and parallel lines. Topics include:

#### Constructions

Constructions covers elementary methods related to perpendicularity, parallelism, bisectors, angles, polygons, circles and centers of a triangle. Topics include:

#### Triangles

Triangles covers basic definitions and theorems, including the relationships between sides and angles, as well as the properties of isosceles triangles. Topics include:

#### Polygons

Polygons covers terms and formulas related to common polygon shapes, specially those of quadrilaterals such as: squares, rectangles, trapezoid, rhombus, parallelograms. Topics include:

#### Circles

Circles covers terms and formulas, including central and inscribed angles, and the relationships between tangents, arcs, secants, chords and circumference. Topics include:

#### Transformations

Transformations covers the practice of geometric transformations, involving reflections, rotations and translations, among others. Topics include:

#### Area

Area covers formulas related to common shapes, such as triangles, quadrilaterals, polygons, circles, and the surfaces of some 3D shapes. Topics include:

#### Pythagorean Theorem

Pythagorean theorem covers proofs, formulas and applications related to this often used theorem. Topics include:

#### Volume

Volume covers terms and formulas related to 3D shapes, particularly those of prisms and cylinders. Topics include:

#### Similarity

Similarity covers how to solve basic proportions, the properties of similarity, similarity shortcuts and the how to use area and volume ratios to find missing information. Topics include:

#### Basic Trigonometry

Basic trigonometry covers the definitions and formulas for the basic trigonometric ratios, as well as the fundamental theorems and some applications Topics include: