Geometry Help and Problems

This section is all about key geometric concepts, theorems, and proofs. Learn how to write mathematical arguments in the form of a two-column geometric proof and study the different properties of shapes by working through these insightful lessons.

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Introduction to Geometry

Main Lesson: Introduction to Geometry

A closer look at the history of geometry, the subject's applications, and the basic concepts of geometry.

Lines and Angles

Main Lesson: Lines and Angles

Learn about the most significant and basic components of geometry: lines and angles.

Triangles

Main Lesson: Triangles

Study the different classifications, properties, and theorems of triangles.

Quadrilaterals

Main Lesson: Quadrilaterals

Move on to the excitement of four-sided polygons called quadrilaterals. Learn about the different quadrilaterals that exist and the properties that make them special.

Areas of Polygons and Circles

Main Lesson: Areas of Polygons and Circles

Use the the different properties of polygons we've studied in order to help find the areas of different figures.